|Origin:||as, from Latin, 'unit, a small coin'|
a playing card with a single spot on it, which usually has the highest value in a game:
the ace of hearts
I've got a pair of aces.
someone who is extremely skilful at doing something:
a soccer ace
cycling ace Chris Boardman
a first shot in tennis or volleyball which is hit so well that your opponent cannot reach the ball and you win the point
to have the advantages in a situation so that you are sure to win:
The Americans hold most of the aces in this technology.
very close to doing or achieving something:
The team came within an ace of winning the championship.
to have a secret advantage which could help you to win or be successful
7 American English informal
something that you keep secretly to use when you need it:
That fifty dollars is my ace in the hole.