Cards. a card having two pips; a two, or two-spot.
2.
Dice.
a.
the face of a die having two pips.
b.
a cast or point of two.
3.
Tennis. a situation, as a score of 40–40 in a game or 5–5 in a match, in which a player must score two successive points to win the game or two successive games to win the set.
4.
Slang.
a.
a two-dollar bill.
b.
the sum of two dollars.
–adjective
5.
(esp. in games, sports, and gambling) two.
[Origin: 1425–75; late ME deus < AF, MF: two < L duōs (masc. acc. of duo)]
A playing card having two spots or the side of a die bearing two pips.
A cast of dice totaling two.
A tied score in tennis in which each player or side has 40 points, or 5 or more games, and one player or side must win 2 successive points to win the game, or 2 successive games to win the set.
tr.v.
deuced, deuc·ing, deuc·es
To make the score of (a tennis game or set) deuce.
[Middle English deus, from Old French, two, from Latin duōs, masculine accusative of duo; see dwo- in Indo-European roots.]
c.1475, "a roll of 2 in dice," from M.Fr. deus, from L. duos (nom. duo) "two." Became a mild oath by 1710, about 50 years after it was first attested in the sense of "bad luck, the devil, etc.," perhaps because two was the lowest score, and probably by similarity to L. deus and related words meaning "god." Low Ger. had der daus! in same sense 16c., which probably influenced the Eng. form. Deuce coup is 1940s hot-rodder slang for "souped up two-door car," especially a 1932 Ford.
Deuce\ (d[=u]s), n. [F. deux two, OF. deus, fr. L. duo. See Two.]1. (Gaming) Two; a card or a die with two spots; as, the deuce of hearts. 2. (Tennis) A condition of the score beginning whenever each side has won three strokes in the same game (also reckoned "40 all"), and reverted to as often as a tie is made until one of the sides secures two successive strokes following a tie or deuce, which decides the game.
Deuce\, n. [Cf. LL. dusius, Armor, dus, te[^u]z, phantom, specter; Gael. taibhs, taibhse, apparition, ghost; or fr. OF. deus God, fr. L. deus (cf. Deity).] The devil; a demon. [A euphemism, written also deuse.] [Low]