(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)

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

(UK, slang) Excellent.

(slang) Asexual, not experiencing sexual attraction.

(slang) A person who is asexual.

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

(film) A member of American Cinema Editors / (biochemistry, medicine) Initialism of angiotensin converting enzyme. / (military, NATO) Initialism of air combat element.

(US, education) Initialism of American Council on Education. / (astronautics) Initialism of Advanced Composition Explorer, a NASA spacecraft. / Initialism of American Cinema Editors.

A male given name. / A common nickname suggesting skill, particularly among airplane pilots.

To be barely admitted into something, or to be admitted only at the last minute.