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Webster 1828 Edition

ppr.

Opening the mouth wide from sleepiness, dullness, wonder or admiration; yawning; opening in fissures; craving.

gaping

gaping ‎(comparative more gaping, superlative most gaping)

Wide open

gaping ‎(plural gapings)

The act of one who gapes.
- 1820, John Cooke, A Treatise on Nervous Diseases: Vol. I on Apoplexy
  M. Le Gallois considers these gapings, which continue for some time after decapitation, as the vain efforts of the head for respiration.
Something gaping; something agape.

act of one who gapes

something agape