/ Dictionary / Index L lockjaw: Meaning and Definition of Find definitions for: lock•jaw Pronunciation: (lok'jô"), [key] — n. Pathol. tetanus in which the jaws become firmly locked together; trismus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lockjaw (Thesaurus) locking pliers lock nut Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language