a playing card with a single spot on it, ranked as the highest card in its suit in most card games

the ace of diamonds

life had started dealing him aces again

a person who excels at a particular sport or other activity

a motorcycle ace

(in tennis and similar games) a service that an opponent is unable to return and thus wins a point

Nadal banged down eight aces in the set

very good

an ace swimmer

Ace! You've done it!

(in tennis and similar games) serve an ace against (an opponent)

he can ace opponents with serves of no more than 62 mph

achieve high marks in (a test or exam)

I aced my grammar test

an asexual person

both asexual, they have managed to connect with other aces offline

(of a person) asexual

I didn't realize that I was ace for a long time