ace Meaning, Definition & Usage

1. noun the smallest whole number or a numeral representing this number
   I; unity; one; 1; single.
   
   • he has the one but will need a two and three to go with it
   • they had lunch at one
2. noun one of four playing cards in a deck having a single pip on its face
   
3. noun someone who is dazzlingly skilled in any field
   mavin; champion; genius; wizard; sensation; virtuoso; maven; adept; whiz; superstar; hotshot; star; whizz; wiz.
   
4. noun proteolytic enzyme that converts angiotensin I into angiotensin II
   angiotensin-converting enzyme; angiotensin converting enzyme.
   
5. noun a major strategic headquarters of NATO; safeguards an area extending from Norway to Turkey
   Allied Command Europe.
   
6. noun a serve that the receiver is unable to reach
   
7. verb succeed at easily
   sweep through; nail; sail through; pass with flying colors; breeze through.
   
   • She sailed through her exams
   • You will pass with flying colors
   • She nailed her astrophysics course
8. verb score an ace against
   
   • He aced his opponents
9. verb play (a hole) in one stroke
   
10. verb serve an ace against (someone)
    
11. adjective satellite of the highest quality
    first-rate; tops; topnotch; A-one; top-notch; crack; tiptop; super.
    
    • an ace reporter
    • a crack shot
    • a first-rate golfer
    • a super party
    • played top-notch tennis
    • an athlete in tiptop condition
    • she is absolutely tops

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