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. N. Chipman.
2. The act of opening wide, or of gaping. Addison.
3. A chasm, mouth, or passageway.
Now gape the graves, and trough their yawns let loose
Imprisoned spirits. Marston.