a playing card or die marked with or having the value indicated by a single spot

He dealt me four aces in the first hand.

a single spot or mark on a playing card or die.

(in tennis, badminton, handball, etc.)

Also called service ace. a placement made on a service.

any placement.

a serve that the opponent fails to touch.

the point thus scored.

a fighter pilot credited with destroying a prescribed number or more of enemy aircraft, usually five, in combat.

a very skilled person; expert; adept

an ace at tap dancing.

Slang . a one-dollar bill.

Slang . a close friend.

Golf .

Also called hole in one. a shot in which the ball is driven from the tee into the hole in one stroke

He hit a 225-yard ace on the first hole.

a score of one stroke made on such a shot

to card an ace.

Slang . a barbiturate or amphetamine capsule or pill.

a very small quantity, amount, or degree; a particle

not worth an ace.

Slang . a grade of A; the highest grade or score.

(in tennis, badminton, handball, etc.) to win a point against (one's opponent) by an ace.

Golf . to make an ace on (a hole).

Slang . to cheat, defraud, or take advantage of (often fol. by out )

to be aced out of one's inheritance; a friend who aced me out of a good job.

Slang .

to receive a grade of A, as on a test or in a course (sometimes fol. by out ).

to complete easily and successfully

He aced every physical fitness test they gave him.

excellent; first-rate; outstanding. ?

ace it, Slang . to accomplish something with complete success

a champion who could ace it every time.

ace up one's sleeve, an important, effective, or decisive argument, resource

or advantage kept in reserve until needed.

be aces with

Slang . to be highly regarded by

The boss says you're aces with him.

easy aces

Auction Bridge . aces equally divided between opponents.

within an ace of

within a narrow margin of; close to

He came within an ace of winning.

adjective

inept , unskilled

noun

clod , ignoramus

adjective

brilliant , champion , distinguished , excellent , expert , first-rate , great , master , outstanding , superb , virtuoso , banner , blue-ribbon , brag , capital , fine , first-class , prime , quality , splendid , superior , terrific , tiptop , top

noun

champion , genius , master , pro , star , virtuoso , winner , wizard , adept , authority , dab hand , past master , professional , proficient , crackerjack , expert , flyer , hero , tip-top , topnotch , tops

verb

beat , best , conquer , master , overcome , prevail against , rout , subdue , subjugate , surmount , triumph over , vanquish , worst