Deuce (dūs), 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, teûz, 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.]