Webster's Revised Unabridged Dictionary · 1913

Gape

Gape (gap; in Eng, commonly gāp; 277) , intransitive verb

[Old English gapen, Anglo-Saxon geapan to open; akin to Dutch gapen to gape, German gaffen, Icelandic & Swedish gapa, Danish gabe; compare Sanskrit jabh to snap at, open the mouth. Compare Gaby, Gap.]

1.
To open the mouth wide
(a)
Expressing a desire for food; as, young birds gape.
(b)
Indicating sleepiness or indifference; to yawn. — Dryden
She stretches, gapes, unglues her eyes, And asks if it be time to rise. — Swift
(c)
Showing unselfconsciousness in surprise, astonishment, expectation, etc.
With gaping wonderment had stared aghast. — Byron
(d)
Manifesting a desire to injure, devour, or overcome.
They have gaped upon me with their mouth. — Job xvi. 10
2.
To open or part widely; to exhibit a gap, fissure, or hiatus.
May that ground gape and swallow me alive! — Shakespeare
3.
To long, wait eagerly, or cry aloud for something; -- with for, after, or at.
The hungry grave for her due tribute gapes. — Denham

Gape , noun

1.
The act of gaping; a yawn. — Addison
2.
(Zoology) The width of the mouth when opened, as of birds, fishes, etc.
Collocations (1)
The gapes , (a) A fit of yawning. (b) A disease of young poultry and other birds, attended with much gaping. It is caused by a parasitic nematode worm (Syngamus trachealis), in the windpipe, which obstructs the breathing. See Gapeworm.