Meaning

• 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.

Meaning

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

• To win a point by an ace.

• To make an ace (hole in one).

Meaning

• Excellent.