Definition of "Ace" :

noun: a serve that the receiver is unable to reach

noun: one of four playing cards in a deck having a single pip on its face

noun: a major strategic headquarters of NATO; safeguards an area extending from Norway to Turkey

noun: someone who is dazzlingly skilled in any field

noun: the smallest whole number or a numeral representing this number

noun: proteolytic enzyme that converts angiotensin I into angiotensin II

verb: serve an ace against (someone)

verb: play (a hole) in one stroke

verb: score an ace against

"He aced his opponents."

verb: succeed at easily

adjective: of the highest quality

"An ace reporter."