1. The smallest whole number or a numeral representing this number (synset 113764713)
    "he has the one but will need a two and three to go with it"; "they had lunch at one"
  2. One of four playing cards in a deck having a single pip on its face (synset 102676145)
  3. Someone who is dazzlingly skilled in any field (synset 109781932)
  4. Proteolytic enzyme that converts angiotensin I into angiotensin II (synset 114759821)
  5. A major strategic headquarters of NATO;
    Safeguards an area extending from Norway to Turkey (synset 108192397)
  6. A serve that the receiver is unable to reach (synset 100569738)
  1. Of the highest quality (synset 302349970)
    "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"
  1. Succeed at easily (synset 202528247)
    "She sailed through her exams"; "You will pass with flying colors"; "She nailed her astrophysics course"
  2. Score an ace against (synset 201115792)
    "He aced his opponents"
  3. Play (a hole) in one stroke (synset 201087541)
  4. Serve an ace against (someone) (synset 201080152)

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