What does the word crest mean?

Usage examples for crest

  1. Once he picked these up, and looked at the crest on them. – Harding's luck by E. [Edith] Nesbit
  2. When I rose to the surface I saw the boat a few yards from me rising on the crest of a wave. – The Birthright by Joseph Hocking
  3. We are on the crest of the wave, and the depression follows quickly. – A Year in the Fields by John Burroughs
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