Search by letter: U
Search by letter
Search by letter: U
- Ulsan: South Korea's Industrial Metropolis and Major Shipbuilding Port Ulsan
- Ulster: province of Ireland, its counties and identity Ulster
- Ulster County, New York: Overview, Geography, and Community Ulster County, New York
- Ulster Scots (Ullans): the Scots variety of Ulster Ulster Scots dialect
- Ulster Scots people
- Ulster Unionist Party (UUP) Ulster Unionist Party
- Ulster Volunteer Force
- Ultar Sar
- Ultima Online: pioneering persistent MMORPG and its sandbox world Ultima Online
- Ultimate (sport): overview, rules, equipment, and competitive play Ultimate (sport)
- Ultimate Aaliyah — posthumous compilation album Ultimate Aaliyah
- Ultimate Air Shuttle
- Ultimate Custom Night
- Ultimate Fighting Championship (UFC) Ultimate Fighting Championship
- Ultra: Allied signals intelligence and codebreaking in World War II Ultra
- Ultra Beatdown
- Ultra High Frequency (UHF): properties, history, and common uses Ultra high frequency
- Ultra Warrior (1990 film) Ultra Warrior
- Ultra-prominent peak (Ultra, P1500) Ultra-prominent peak
- Ultramarine (deep blue pigment and colour) Ultramarine
- Ultramega OK — Soundgarden's debut studio album (1988) Ultramega OK
- Ultramontanism
- Ultrasound: properties, applications, and overview Ultrasound
- Ultratop: Belgium's Official Regional Music Charts Ultratop
- Ultratop 40 Singles (Wallonia) — Belgian weekly singles chart Ultratop 40 Singles
- Ultratop 50 Singles — Flanders weekly singles chart Ultratop 50 Singles
- Ultraviolet (UV) radiation Ultraviolet
- Ultraviolet catastrophe
- Ultraviolet–visible absorption
- Uluburun Shipwreck (Late Bronze Age trading vessel) Uluburun
- Ulundurpettai taluk (Villupuram district, Tamil Nadu) Ulundurpettai taluk
- Uluru (Ayers Rock) — Sacred sandstone monolith of central Australia Uluru
- Uluṟu‑Kata Tjuṯa National Park Uluṟu-Kata Tjuṯa National Park
- Uluṟu–Kata Tjuṯa Aboriginal Land Trust
- Ulva — Inner Hebrides island off Mull: geography, history and demographic change Ulva
- Ulverston — market town in Cumbria, England Ulverston
- Ulyanovsk
- Ulysses (1954 film) Ulysses (1954 movie)
- Ulysses (1967 film) — Joseph Strick's adaptation of Joyce Ulysses (1967 movie)
- Ulysses (novel) by James Joyce Ulysses (novel)
- Ulysses (spacecraft)
- Ulysses Guimarães: Brazilian statesman and leader of the return to democracy Ulysses Guimarães
- Ulysses S. Grant: Union General and 18th President of the United States Ulysses S. Grant
- Ulysses, Kansas city in and the county seat of Grant County, Kansas, United States
- Ulzana's Raid
- Uma Shankar Mishra (1923–2016) — Indian independence activist and Congress leader Uma Shankar Mishra
- Uma Thurman: American actress known for Pulp Fiction and Kill Bill Uma Thurman
- Umar ibn al-Khattab: Second Rashidun Caliph and Statesman Umar
- Umar Arteh Ghalib Umar Ghalib
- Umar Sheikh Mirza II — Timurid ruler of the Fergana Valley Umar Sheikh Mirza
- Umaru Dikko
- Umaru Musa Yar'Adua: Nigerian President and Politician (1951–2010) Umaru Musa Yar'Adua
- Umatilla County, Oregon
- Umatilla, Florida
- Umatilla, Oregon: Riverfront city with historic roots Umatilla, Oregon
- Umayyad Caliphate the second of the four major Islamic caliphates
- Umayyad conquest of Hispania: origins, campaign, and legacy Umayyad conquest of Hispania
- Umayyad Mosque (Grand Mosque of Damascus) Umayyad Mosque
- Umbanda: Brazil's syncretic spiritual tradition Umbanda
- Umbayee: Malayalam Ghazal Singer and Folk-Influenced Composer Umbayee
- Umberto Borsò — Italian operatic tenor Umberto Borsò
- Umberto Bossi: Italian regionalist leader and founder of the Northern League Umberto Bossi
- Umberto Eco: Italian novelist, philosopher and scholar of signs Umberto Eco
- Umberto Giordano
- Umberto I of Italy: king, reign, and legacy (1844–1900) Umberto I of Italy
- Umberto Lenzi: Italian genre filmmaker and cult director Umberto Lenzi
- Umberto Raho: Italian character actor in stage, film and television Umberto Raho
- Umberto Saba: Italian poet and writer (1883–1957) Umberto Saba
- Umbilical cord: structure, function, and clinical significance Umbilical cord
- Umbilicus (Navel): Anatomy, Development, and Clinical Significance Umbilicus
- Umbrella: design, history, types and uses Umbrella
- Umbrella (song) — Rihanna featuring Jay-Z Umbrella (song)
- Umbrella tree (common name for several plant species) Umbrella tree
- Umbria — the green heart of central Italy Umbria
- Umbriel — the dark moon of Uranus Umbriel (moon)
- Umbundu (South Mbundu): language of the Ovimbundu people Umbundu
- Umeå — northern Swedish city of birch trees, university and culture Umeå
- Umeå FC
- Umeå IK — Swedish women's football club Umeå IK
- Umeå Municipality
- Umeå Pentecostal Church (Umeå pingstkyrka) Umeå Pentecostal Church
- Umerkot (Umarkot) — town in Sindh, Pakistan Umerkot
- Umerkot District
- Umiken (former municipality in Aargau, Switzerland) Umiken
- Umkhonto we Sizwe: the ANC's armed wing in the struggle against apartheid Umkhonto we Sizwe
- Umlaut: diacritic dots and their role in Germanic and other languages Umlaut
- Umm Kulthum: Egyptian Singer, Songwriter, and Cultural Icon Umm Kulthum
- Ummerstadt (Thuringia, Germany) Ummerstadt
- Umpire: role, duties, types and history of sports officials Umpire
- Umuwa, South Australia: administrative centre of the APY Lands Umuwa, South Australia
- Un ballo in maschera
- Un medico in famiglia: overview of the long‑running Italian family drama Un medico in famiglia
- UN Women: United Nations Entity for Gender Equality and the Empowerment of Women UN Women
- Una O'Connor: Irish character actress known for stage and film work Una O'Connor (actress)
- Unai Emery — Spanish football manager and former player Unai Emery
- Unalakleet, Alaska — Norton Sound coastal community and regional hub Unalakleet, Alaska
- Unalaska, Alaska: ports, history, and life on the Aleutian islands Unalaska, Alaska
- Unapologetic (Rihanna album) Unapologetic
- Unbinilium (element 120) Unbinilium
- Unbioctium (element 128) — proposed superheavy element Unbioctium
- Unbipentium (Ubp) — hypothetical element with atomic number 125 Unbipentium
- Unbiunium (Ubu) — hypothetical element with atomic number 121 Unbiunium
- Unbreakable (Janet Jackson album)
- Uncanny valley: human likeness and emotional response Uncanny valley
- Uncertain, Texas
- Uncertainty principle also called the Heisenberg uncertainty principle
- UNCF (United Negro College Fund): mission, history, programs, and impact UNCF
- Uncle: definition, kinship relationships, cultural roles and honorary usage Uncle
- Uncle B — debut album by N-Dubz Uncle B
- Uncle Ben (Benjamin Parker) — the moral catalyst of Spider-Man Uncle Ben
- Uncle Buck (1989 film) Uncle Buck
- Uncle Grandpa
- Uncle Sam: the personification of the United States Uncle Sam
- Uncle Tom's Cabin — Harriet Beecher Stowe's 1852 anti‑slavery novel Uncle Tom's Cabin
- Uncle Tupelo: Pioneers of the American Alternative Country Movement Uncle Tupelo
- Uncommon Valor (1983 film) Uncommon Valor
- Unconditionally (Katy Perry song) Unconditionally
- Unconformity (geology): definition, types, and significance Unconformity
- Unconscious mind
- Uncountable set
- Uncut Gems (2019 film) Uncut Gems
- Uncyclopedia (satirical wiki) Uncyclopedia
- Under Construction (Missy Elliott album)
- Under My Skin (2004 album by Avril Lavigne) Under My Skin
- Under My Skin (1950 film) Under My Skin (movie)
- Under Siege (1992) — action thriller set aboard a U.S. battleship Under Siege
- Under the Bridge (Red Hot Chili Peppers song) Under the Bridge
- Under the Iron Sea (Keane album) Under the Iron Sea
- Under the Lilacs
- Under the Pink (Tori Amos album) Under the Pink
- Under the Rainbow — 1981 satirical comedy film Under the Rainbow
- Under the Volcano
- Under the Yum Yum Tree (1963 film) Under the Yum Yum Tree
- Undercarriage (Aircraft Landing Gear) Undercarriage
- Underclass (social group) Underclass
- Underclass Hero (Sum 41 album) Underclass Hero
- Underclocking: reducing clock speed to save power and heat Underclocking
- Undercover: covert identity and operations in policing and investigation Undercover
- Undercroft: vaulted cellar and historic storage space Undercroft
- Undergraduate education: overview, structure, and global variations Undergraduate education
- Underground cable: buried electrical and telecommunications lines Underground cable
- Underground hip hop
- Underground Railroad: secret network for enslaved people seeking freedom Underground Railroad
- Underline (typography and digital text) Underline
- Underneath Your Clothes — Shakira song Underneath Your Clothes
- Undernet — an Internet Relay Chat network Undernet
- Undersea cable (submarine communications and power cables) Undersea cable
- Understanding Media: The Extensions of Man — concepts, examples, and legacy Understanding Media
- Understudy (theatre): role, types, duties and career importance Understudy
- Undertale role-playing video game
- Undertow (Tool album) — 1993 debut full-length and its legacy Undertow (Tool album)
- Undervelier (former Swiss municipality) Undervelier
- Underwater: the environment beneath a water surface Underwater
- Underwater diving: types, equipment, history and safety Underwater diving
- Underwater Observatory Marine Park, Eilat Underwater Observatory Marine Park Eilat
- Underwear: Types, Purposes, History and Cultural Roles Underwear
- Underweight: Definition, Causes, Risks and Management Underweight
- Underwood, Iowa
- Undrafted Sportsperson (Undrafted Free Agent) Undrafted sportsperson
- Undulator: periodic magnet device for bright, tunable synchrotron radiation Undulator
- Unemployment: causes, types, consequences and policy responses Unemployment
- Unenlagia: a bird-like theropod from the mid-Cretaceous Unenlagia
- UNESCO: United Nations Educational, Scientific and Cultural Organization UNESCO
- UNetbootin — Universal Netboot Installer UNetbootin
- Unfaithful (song)
- Unfinished building
- Unfinished Sympathy
- Unforgettable (Selena album)
- Unforgiven (1992 film) Unforgiven
- Unforgiven (1999) — WWF pay-per-view held in Charlotte Unforgiven (1999)
- Unforgiven (2000) — WWF pay-per-view Unforgiven (2000)
- Unforgiven (2001)
- Unforgiven (2002) — WWE pay-per-view Unforgiven (2002)
- Unforgiven (2003)
- Unforgiven (2004): WWE pay-per-view in Portland, Oregon Unforgiven (2004)
- Unforgiven (2005) — WWE pay-per-view in Oklahoma City Unforgiven (2005)
- Unforgiven (2006)
- Unforgiven (2007) — WWE pay-per-view event Unforgiven (2007)
- Unforgiven (2008) — WWE pay-per-view event Unforgiven (2008)
- Ungdomshuset (Jagtvej 69): history, conflict and cultural legacy Ungdomshuset
- Ungersheim: an Alsatian commune in Haut-Rhin, eastern France Ungersheim
- Ungulate: Hoofed Mammals — Definition, Biology, and Evolution Ungulate
- União São João Esporte Clube
- Unicameralism: the single‑chamber legislature Unicameralism
- UNICEF — United Nations agency for children's welfare UNICEF
- Unicellular organism (single-celled life) Unicellular organism
- Unicode: a universal standard for encoding text and symbols Unicode
- Unicoi County, Tennessee
- Unicorn: legendary one‑horned creature, history, symbolism and modern meanings Unicorn
- Unicycle: single-wheel cycle — design, history, and uses Unicycle
- Unidentified flying object (UFO) Unidentified flying object
- Unification Church
- German Unification in the 19th Century: From Fragmented States to the 1871 Empire Unification of Germany
- Unified Modeling Language (UML): overview, diagrams, history and uses Unified Modeling Language
- Uniform (clothing indicating membership, role and function) Uniform
- Uniform number (American football)
- Uniform number (Major League Baseball)
- Uniform Resource Identifier (URI) Uniform Resource Identifier
- Uniform Resource Locator (URL): structure, purpose, history and usage Uniform Resource Locator
- Uniformitarianism: Principles, History, and Modern Significance Uniformitarianism
- Unikitty! (TV series) Unikitty!
- Unikont (Unikonta): historical eukaryote supergroup Unikont
- Unilateral Disarmament: Concept, History, and Debates Unilateral disarmament
- Unilever: Overview of the Anglo‑Dutch Consumer Goods Company Unilever
- UniMás: United States Spanish-Language Television Network UniMás
- Unincorporated area
- Unintended consequences: causes, types, history, and examples Unintended consequences
- Uninterruptible power supply (UPS): purpose, types, batteries and uses Uninterruptible power supply
- Union: meanings, types, and uses Union
- Union (American Civil War)
- Union Army (United States Civil War) Union Army
- Union Army of the West (1861) Union Army of the West
- Union between Sweden and Norway (1814–1905) Union between Sweden and Norway
- Union Carbide Corporation Union Carbide
- Union City, California
- Union City, Indiana
- Union City, New Jersey
- Union City, Oklahoma — overview of a small American town Union City, Oklahoma
- Union City, Tennessee: Obion County Seat and Regional Service Center Union City, Tennessee
- Union College (Schenectady, New York) Union College
- Union Councils of Pakistan
- Union County, Arkansas
- Union County, Florida
- Union County, Georgia
- Union County, Illinois
- Union County, Indiana
- Union County, Iowa
- Union County, Kentucky
- Union County, Mississippi
- Union County, New Jersey
- Union County, New Mexico
- Union County, North Carolina
- Union County, Ohio: overview, history, and economy Union County, Ohio
- Union County, Oregon
- Union County, Pennsylvania
- Union County, South Carolina: Overview, History, and Local Features Union County, South Carolina
- Union County, South Dakota
- Union County, Tennessee
- Union Cycliste Internationale (UCI) Union Cycliste Internationale
- Union Defence Force (United Arab Emirates) Union Defence Force (UAE)
- Unión Española
- Union for a Popular Movement (UMP) Union for a Popular Movement
- Union Gap, Washington — City Adjacent to Yakima in Central Washington Union Gap, Washington
- Union List of Artist Names (ULAN) Union List of Artist Names
- Union of European Football Associations (UEFA) Union of European Football Associations
- Union of South Africa (1910–1961) Union of South Africa
- Union of the Democratic Centre (Spain)
- Union of Utrecht (Old Catholic)
- Union organizer
- Union Pacific Railroad: Overview, History, and Role in U.S. Freight Transportation Union Pacific Railroad
- Union Parish, Louisiana
- Union representative (shop steward): role, duties, and significance Union representative
- Union Springs, Alabama: County Seat and Small City in the Black Belt Union Springs, Alabama
- Union Square, Manhattan — public plaza and neighborhood in New York City Union Square, Manhattan
- Union Stock Yards (Chicago) Union Stock Yards
- Union Territory (India): definition, governance and examples Union territory
- Union Vale, New York — town in Dutchess County Union Vale, New York
- Union, Alabama
- Union, Iowa: overview of a small Midwestern city Union, Iowa
- Union, Kentucky — suburban city in Boone County, northern Kentucky Union, Kentucky
- Unionist Party (Punjab)
- Uniontown, Alabama
- Uniontown, Kansas
- Uniontown, Kentucky
- Uniontown, Pennsylvania
- Unionville, Iowa
- Unionville, Missouri
- Unirea, Dolj County (commune) Unirea, Dolj
- Unison (Céline Dion album) Unison
- Unisphere (Flushing Meadows–Corona Park globe) Unisphere
- Unit — meanings, uses, and notable forms Unit
- Unit circle
- Unit of length
- Physical Measurement and Units: Systems, Standards, and SI Definitions Unit of measurement
- Unit vector: definition, properties and common uses Unit vector
- Unita Blackwell: Civil Rights Organizer and Mayor of Mayersville Unita Blackwell
- Unitarian Universalism: beliefs, history, and community life Unitarian Universalism
- Unitarianism: beliefs, history, and distinctions Unitarianism
- Unitary
- Unitary authority: single-tier local government explained Unitary authority
- Unitary state
- Unité de formation et de recherche médicale Paris Île-de-France Ouest (Paris Ouest) Unité de formation et de recherche médicale Paris Île-de-France Ouest
- Unite the Right rally (Charlottesville, 2017) Unite the Right rally
- United 93 (film) United 93 (movie)
- United Airlines: history, operations, and brand evolution United Airlines
- United Airlines Flight 175
- United Airlines Flight 232: 1989 DC-10 Crash and Its Lasting Impact United Airlines Flight 232
- United Airlines Flight 93 hijacked and crashed plane
- United Arab Emirates
- United Arab Emirates at the Olympics
- United Arab Emirates national football team
- United Arab List (Ra'am) — Israeli Arab political party United Arab List
- United Arab Republic (1958–1961) United Arab Republic
- United Armenia (Greater Armenia) United Armenia
- United Artists — the filmmaker-founded American studio United Artists
- United Center
- United Church of Canada
- United Counties of Prescott and Russell
- United Empire Loyalists: refugees of the American Revolution and their legacy United Empire Loyalists
- United First Parish Church, Quincy, Massachusetts