Overview

Across is an English word most commonly used as a preposition and an adverb to indicate position, movement from one side to another, or distribution over an area. It appears in both literal contexts (for example, moving across a street) and figurative ones (ideas spreading across disciplines).

Grammatical roles and typical uses

As a preposition, across links nouns or pronouns to the rest of the sentence: "She walked across the bridge." As an adverb it modifies verbs without taking a direct object: "They ran across." It can also form part of compound expressions and adjectives, such as "across-the-board" and "cross-country" when used in adjectival positions.

Spatial vs. figurative meanings

Spatial uses describe lateral position or movement: across the road, across the lake, across the table. Figurative uses describe distribution or transmission: across generations, across the internet, across fields of study. The figurative sense often implies reach or spread rather than physical crossing.

Idioms and lexical compounds

  • Get (something) across — to communicate effectively (e.g., "He got his point across").
  • Come across — to encounter or appear to be (e.g., "She came across as confident").
  • Compound forms — used in adjectives like "across-the-board" (meaning applying to all) or labels such as "Across clues" in crossword puzzles.

Etymology and development

The word developed in Middle English from a combination of an adverbial prefix a- (on/at) and cross, meaning literally to the other side of a cross or barrier. Over centuries it broadened from physical crossing to general senses of distribution and reach.

Distinctions and common confusions

Across is often compared with prepositions such as over, through, and along. Use over when something is above or covers a surface; through implies passage within an interior; along follows a line or edge. "Across from" is an idiom meaning opposite in position ("The café is across from the library"). Careful choice among these words clarifies direction, relation, and nuance in both literal and metaphorical contexts.