(slang) excellence

plural of ace of aces

(military) The greatest active flying ace in a nation's military service.

(US) To pass (a test, interviews etc.) perfectly. / (tennis) To win a point by an ace. / (golf) To make an ace (hole in one).

(card games, dice games) A single point or spot on a playing card or die normally indicating it as the prime, i.e. first and forefront. (in playing cards, of that series)

(UK, slang) Excellent.

(slang) A person who is asexual.

(slang) Asexual, not experiencing sexual attraction.

Initialism of all clear (as in button on electronic calculator). / (medicine) Initialism of ante cibum (before meals). / (law) as charged, as in: guilty as charged, usually a/c.

Aceh, an autonomous province of Indonesia. / (geography) Acre, a state of Brazil. / Initialism of America's Cup (competition yacht sailing match racing regatta).