Definition of "ace"
A single point or spot on a playing card or die.
A card or die face so marked.
A very small quantity or degree; a particle; an atom; a jot.
A serve won without the opponent hitting the ball.
The best pitcher on the team.
A hole in one.
An expert at something.
A military aircraft pilot who is credited with shooting down five or more enemy aircraft.
A perfect score on a school exam.
To pass (a test, interviews etc.) perfectly.
To win a point by an ace.
To make an ace (hole in one).