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."