• (uncountable) A disease in poultry caused by gapeworm in the windpipe, a symptom of which is frequent gaping.
  • A large opening.
  • (zoology) The maximum opening of the mouth (of a bird, fish, etc.) when it is open.
  • (uncommon) An act of gaping; a yawn.
  • The width of an opening.


  • (intransitive) To open wide; to display a gap.
  • (intransitive) To stare in wonder.
  • (intransitive) To open the mouth wide, especially involuntarily, as in a yawn, anger, or surprise.

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