(card games) A playing card showing a single pip, typically the highest or lowest ranking card in a game.
(dice games) A die face marked with a single dot, typically representing the number one.
The ball marked with the number 1 in pool and related games.
(US, slang) A dollar bill.
A very small quantity or degree; a particle; an atom; a jot.
(tennis, volleyball) A serve won without the opponent hitting the ball.
(sports) A point won by a single stroke, as in handball, rackets, etc.
(US, baseball) The best pitcher on the team.
(US, golf, disc golf) A hole in one.
(sometimes attributive) An expert at something; a maverick, genius; a person of supreme talent.
A military aircraft pilot who is credited with shooting down many enemy aircraft, typically five or more.
(US) A perfect score on a school exam.
Any of various hesperiid butterflies.
(slang) A person who is asexual.
(transitive, US, informal) To pass (a test, interviews etc.) perfectly.
(transitive, intransitive, US, informal) To defeat (others) in a contest; to outdo (others) in a competition.
(transitive, intransitive, tennis) To win a point against (an opponent) by an ace.
(golf) To make an ace (hole in one).
(UK, slang) Excellent.
(slang) Asexual, not experiencing sexual attraction.