A single point or spot on a playing card or die.

A card or die face so marked.

"I have the ace of diamonds."

The ball marked with the number 1 in pool and related games.

A very small quantity or degree; a particle; an atom; a jot.

A serve won without the opponent hitting the ball.

A single point won by a stroke, as in handball, rackets, etc.

The best pitcher on the team.

(19th century) A run.

A hole in one.

An expert at something.

A military aircraft pilot who is credited with shooting down many enemy aircraft, typically five or more.

A perfect score on a school exam.

Any of various hesperiid butterflies.

A quark.

(US) To pass (a test, interviews etc.) perfectly.

To win a point by an ace.

To make an ace (hole in one).

Excellent.

A person who is asexual.

Asexual. (not experiencing sexual attraction)