What is the meaning of ace?

noun

• The smallest whole number or a numeral representing this number.
  • usage: "he has the one but will need a two and three to go with it"; "they had lunch at one"
  • synonyms: one, 1, I, single, unity
• One of four playing cards in a deck having a single pip on its face.
• Someone who is dazzlingly skilled in any field.
  • synonyms: adept, champion, sensation, maven, mavin, virtuoso, genius, hotshot, star, superstar, whiz, whizz, wizard, wiz
• Proteolytic enzyme that converts angiotensin I into angiotensin II.
  • synonyms: angiotensin converting enzyme, angiotensin-converting enzyme
• A major strategic headquarters of NATO; safeguards an area extending from Norway to Turkey.
  • synonyms: Allied Command Europe
• A serve that the receiver is unable to reach.

verb

• Succeed at easily.
  • usage: "She sailed through her exams"; "You will pass with flying colors"; "She nailed her astrophysics course"
  • synonyms: breeze through, pass with flying colors, sweep through, sail through, nail
• Score an ace against.
  • usage: "He aced his opponents"
• Play (a hole) in one stroke.
• Serve an ace against (someone. )

adjective

• Of the highest quality.
  • usage: "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"
  • synonyms: A-one, crack, first-rate, super, tiptop, topnotch, top-notch, tops