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[jaw] /dʒɔ/
either of two bones, the mandible or maxilla, forming the framework of the mouth.
the part of the face covering these bones, the mouth, or the mouth parts collectively:
My jaw is swollen.
jaws, anything resembling a pair of jaws or evoking the concept of grasping and holding:
the jaws of a gorge; the jaws of death.
  1. one of two or more parts, as of a machine, that grasp or hold something:
    the jaws of a vise.
  2. any of two or more protruding parts for attaching to or meshing with similar parts.
Often, jaws. Also called throat. Nautical. a forked piece at the end of a gaff, fitting halfway around the mast.
  1. idle talk; chatter.
  2. impertinent talk.
verb (used without object)
  1. to talk; chat; gossip.
  2. to scold or use abusive language.
verb (used with object)
Slang. to scold.
1325-75; Middle English jawe, jowe < Old French joue; origin uncertain
Related forms
jawless, adjective


[jaw] /dʒɔ/ Scot. and North England
a swelling wave of water; billow.
verb (used without object)
(of liquid) to surge, splash, or dash forward, as in waves.
verb (used with object)
to pour or splash (liquid).
1505-15; perhaps akin to jaup Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for jaw
  • Manganese steel is used for both fixed and movable jaw faces.
  • The alveolar bone is the bone of the jaw which forms the alveolus around teeth.
  • The giant panda has large molar teeth and strong jaw muscles for crushing tough bamboo.
  • The dentary gradually becomes the main bone of the lower jaw.
  • The jaw is made of bone, typically hollow or porous to conserve weight for flying.
  • She was also severely ill and was operated on for osteomyelitis of the jaw.
  • Its single row of teeth in each jaw are uniform in size, knifeedged and sharp.
  • Their eyes are small and their lower jaw projects slightly past the upper jaw.
  • The upper jaw extends over the lower jaw, which has a well developed chin barbel.
  • Its powerful forequarters, neck, and jaw serve to grasp and hold large prey.
British Dictionary definitions for jaw


the part of the skull of a vertebrate that frames the mouth and holds the teeth. In higher vertebrates it consists of the upper jaw (maxilla) fused to the cranium and the lower jaw (mandible) related adjectives gnathal gnathic
the corresponding part of an invertebrate, esp an insect
a pair or either of a pair of hinged or sliding components of a machine or tool designed to grip an object
  1. impudent talk; cheek
  2. idle conversation; chat
  3. moralizing talk; a lecture
(intransitive) (slang)
  1. to talk idly; chat; gossip
  2. to lecture
See also jaws
Derived Forms
jawlike, adjective
Word Origin
C14: probably from Old French joue cheek; related to Italian gota cheek
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for jaw

late 14c., "the bones of the mouth," perhaps from Old French joue "cheek," from Gaulish *gauta "cheek," or perhaps a variant of Germanic words related to chew (q.v.); cf. also jowl. Replaced Old English ceace, ceafl.


1610s, "to catch in the jaws, devour," from jaw (n.). In slang from 1748, "to gossip, to speak" 1810, "to scold." Related: Jawed; jawing. Hence 19c. U.S. slang jawsmith "talkative person" (1887).

Online Etymology Dictionary, © 2010 Douglas Harper
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jaw in Medicine

jaw (jô)

  1. Either of two bony structures that form the framework of the mouth and hold the teeth.

  2. The mandible or maxilla or the part of the face covering these bones.

jaw'less adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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jaw in Science
  1. Either of two bony or cartilaginous structures that in most vertebrate animals form the framework of the mouth, hold the teeth, and are used for biting and chewing food. The lower, movable part of the jaw is the mandible. The upper, fixed part is the maxilla.

  2. Any of various structures of invertebrate animals, such as the pincers of spiders or mites, that function similarly to the jaws of vertebrates.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for jaw



: ain't had a good jaw together (1842+)

  1. To talk; chat; converse: Can't stand here jawing with you all day (1760+)
  2. To exhort; lecture; strive to persuade orally; jawbone: had kept sober for several months by jawing drunks, unsuccessfully (1810+)
Related Terms

bat one's gums, crack one's jaw, flapjaw, glass jaw, ratchet-mouth

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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