/ Dictionary / Index O open-mouthed: Meaning and Definition of Find definitions for: o•pen-mouthed Pronunciation: (ō'pun-moud', -moutht'), [key] — adj. having the mouth open. gaping, as with surprise or astonishment. greedy, ravenous, or rapacious. clamoring at the sight of game or prey, as hounds. vociferous or clamorous. having a wide mouth, as a pitcher or jar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: open-mouthed (Thesaurus) open-minded open order Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language