Meaning of ACE in English
/ eɪs; NAmE / noun , adjective
a playing card with a large single symbol on it, which has either the highest or the lowest value in a particular card game :
the ace of spades / hearts / diamonds / clubs
( informal ) a person who is very good at doing sth :
a soccer / flying ace
an ace marksman
( in tennis ) a serve (= the first hit) that is so good that your opponent cannot reach the ball :
He served 20 aces in the match.
- an ace up your sleeve
- hold all the aces
- play your ace
- within an ace of sth / of doing sth
( informal ) very good :
We had an ace time.
Middle English (denoting the “one” on dice): via Old French from Latin as unity, a unit.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005