1. The face of a die that bears two spots
2. A playing card bearing an index number two
3. A throw of the dice yielding two points
4. [obsolete English deuce bad luck] Devil, dickens — used chiefly as a mild oath; something notable of its kind
5. One of four cards in a deck having two spots.
(Neues Testament) Diabolos, Satan, die bei fast allen Völkern bek. Verkörperung des Bösen. Nach einer Vorstellung des NT ist der T. der mit seinem Anhang (böse Geister oder Dämonen) von Gott abgefallene höchste Engel (Lucifer). Beelzebub.
A tie in tennis after each side has scored 40 requiring two consecutive points by one side to win
To bring the score of (a tennis game or set) to deuce.