Noun
an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom; "he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"; "he apologized for his ostinancy"

Verb
utter a yawn, as from lack of oxygen or when one is tired; "The child yawned during the long performance"

Verb
be wide open; "the deep gaping canyon"

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v. i.
To open the mouth involuntarily through drowsiness, dullness, or fatigue; to gape; to oscitate.

v. i.
To open wide; to gape, as if to allow the entrance or exit of anything.

v. i.
To open the mouth, or to gape, through surprise or bewilderment.

v. i.
To be eager; to desire to swallow anything; to express desire by yawning; as, to yawn for fat livings.

n.
An involuntary act, excited by drowsiness, etc., consisting of a deep and long inspiration following several successive attempts at inspiration, the mouth, fauces, etc., being wide open.

n.
The act of opening wide, or of gaping.

n.
A chasm, mouth, or passageway.

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Yawn

Yawn , v. i. [imp. & p. p. Yawned ; p. pr. & vb. n. Yawning.] [OE. yanien, 'f4anien, ganien, gonien, AS. g'benian; akin to ginian to yawn, g'c6nan to yawn, open wide, G. g'84hnen to yawn, OHG. gin&emac;n, gein&omac;n, Icel. g'c6na to yawn, gin the mouth, OSlav. zijati to yawn, L. hiare to gape, yawn; and perhaps to E. begin, cf. Gr. a hole. b. Cf. Begin, Gin to begin, Hiatus.] 1. To open the mouth involuntarily through drowsiness, dullness, or fatigue; to gape; to oscitate. "The lazy, yawning drone." Shak.

And while above he spends his breath, The yawning audience nod beneath.

2. To open wide; to gape, as if to allow the entrance or exit of anything.

't is now the very witching time of night, When churchyards yawn.

3. To open the mouth, or to gape, through surprise or bewilderment. Shak. 4. To be eager; to desire to swallow anything; to express desire by yawning; as, to yawn for fat livings. "One long, yawning gaze." Landor.

Yawn

Yawn, n. 1. An involuntary act, excited by drowsiness, etc., consisting of a deep and long inspiration following several successive attempts at inspiration, the mouth, fauces, etc., being wide open.

One person yawning in company will produce a spontaneous yawn in all present.

2. The act of opening wide, or of gaping. Addison. 3. A chasm, mouth, or passageway. [R.]

Now gape the graves, and trough their yawns let loose Imprisoned spirits.

To open the mouth involuntarily through drowsiness, dullness, or fatigue; to gape; to oscitate.

An involuntary act, excited by drowsiness, etc., consisting of a deep and long inspiration following several successive attempts at inspiration, the mouth, fauces, etc., being wide open.