ace Meaning in Cambridge American English Dictionary
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Meaning of "ace" - American English Dictionary

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acenoun [C]

 us   /eɪs/

ace noun [C] (PLAYING CARD)

one of the four playing cards with a single mark or spot, which have the highest or lowest value in many card games

ace noun [C] (TENNIS)

a serve (= hit of the ball that starts play) in tennis that is so strong and fast the other player cannot return the ball

ace noun [C] (SKILLED PERSON)

infml a person who is unusually good at doing something skillful: Yankee ace Chien-Ming Wang will pitch tonight’s game.
(Definition of ace from the Cambridge Academic Content Dictionary © Cambridge University Press)
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