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ace - definition and synonyms

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noun [countable]     ace pronunciation in American English
Word Forms
  1. 1
    in card games, a card with only one symbol and either the highest or lowest value in a suit

    the ace of hearts

  2. 2
    in tennis, a very fast serve (=first hit of the ball) that your opponent cannot reach with their racket
    Synonyms and related words
  3. 3
    American in golf, an occasion in which a player hits the ball into the hole with one shot
    Synonyms and related words
  4. 4
    informal someone who is very good at doing something

    an ace at solving puzzles



a rainbow produced when water droplets in the air reflect light from the moon rather than the sun

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platform capitalism

a way of doing business that involves recruiting large numbers of people who work for themselves using the company's platform, as used by companies such as Uber, Deliveroo and the like

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