jaw

1. One of the bones, usually bearing teeth, which form the framework of the mouth.
2. The part of the face below the mouth.

   His jaw dropped in amazement.

3. Anything resembling the jaw of an animal in form or action; especially plural, the mouth or way of entrance.

   the jaws of a pass; the jaws of darkness; the jaws of death.

4. A notch or opening.
5. A notched or forked part, adapted for holding an object in place.

   the jaw of a railway-car pedestal.

6. One of a pair of opposing parts which are movable towards or from each other, for grasping or crushing anything between them.

   the jaws of a vise; the jaws of a stone-crushing machine.

7. The inner end of a boom or gaff, hollowed in a half circle so as to move freely on a mast.
8. Impudent or abusive talk.
9. Axle guard.
10. The curved part of the cushion marking the entry to the pocket.

1. To assail or abuse by scolding.
2. To scold; to clamor.
3. To talk; to converse.
4. (of a ball) To stick in the jaws of a pocket.

adjective

(used in certain set phrases like jaw harp, jaw harpist and jaw's-trump)