Ace (playing card)

History and etymology

The word "ace" entered English from Old French and Latin roots that meant a single unit. In medieval gaming the die face showing one was considered unlucky; in Middle English the ace could be associated with misfortune. Over centuries the meaning shifted in many contexts: while it originally indicated the lowest possible score, the ace came to be used as the highest-ranking card in numerous games, reversing its earlier connotation.

Characteristics and notable examples

Design: Most aces display a single pip at center; the ace of spades commonly includes extra printing, manufacturer details, or ornate motifs. Function: the ace's numerical and ranking role depends on the game. For a basic introduction to card design see playing card references; for related information on dice faces see dice.

Role in games and rules

Different games treat the ace in varied ways. Typical patterns include:

• Ace high: the ace outranks the king and functions as the top card (common in trick-taking games such as bridge).
• Ace low: the ace ranks below the two and is the smallest card (used in some lowball variants and certain sequenced games).
• Flexible ace: some games allow the ace to be either high or low; for example, in many poker variants an ace may complete a high straight (10–J–Q–K–A) or a low straight (A–2–3–4–5).
• Dual-value ace: in blackjack the ace counts as 1 or 11 depending on which is more advantageous for the hand.

Uses, symbolism and distinctions

Beyond strict rules, "ace" is used figuratively to mean excellence (to "ace" a test) and appears in sports terminology (a serve that is unreturned is called an ace). Some specific aces, such as the ace of spades, carry cultural or historical weight and have been used in printing, military insignia, and popular culture. Discussions of historical usage and linguistic notes may refer to older sources such as Middle English documents; see a brief historical note on historical usage.

Because the ace's rank is determined by convention, players and rules writers should state clearly whether aces are high, low, or both when establishing game rules. That flexibility is part of what makes the ace a small but central element in the design and strategy of many tabletop and gambling games.