either of two cartilaginous or bony structures that in most vertebrates form a framework above and below the mouth in which the teeth are set
a similar structure in anany of various organs of invertebrates that perform the function of the vertebrate jaw
(in pl) the two parts of a machine, tool, etc between which something may be clamped or crushed
the jaws of a vice
(in pl) the imminent prospect of something unpleasant, imagined as a pair of open jaws about to seize or swallow a victim
He has stared into the jaws of death
informal
continual talk
a friendly chat
[Middle English, prob from Old French joe cheek]