[oh-puhn-mouthd, -moutht]
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  1. having the mouth open.
  2. gaping, as with surprise or astonishment.
  3. greedy, ravenous, or rapacious.
  4. clamoring at the sight of game or prey, as hounds.
  5. vociferous or clamorous.
  6. having a wide mouth, as a pitcher or jar.

Origin of open-mouthed

First recorded in 1525–35
Related formso·pen-mouth·ed·ly [oh-puhn-mou-thid-lee, -moutht-lee] /ˈoʊ pənˈmaʊ ðɪd li, -ˈmaʊθt li/, adverbo·pen-mouth·ed·ness, noun

Synonyms for open-mouthed

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2. dumbfounded, flabbergasted, confounded, thunderstruck. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for open-mouthed

Historical Examples of open-mouthed

  • I thought he must be crazed by over-study, and I could only sit and stare at him, open-mouthed.

  • And off he stumped, leaving Cyrus staring after him, open-mouthed.

  • Frau Matilda now gazed at me with open-mouthed astonishment.

  • He, staring at her open-mouthed, replied that he was going nowhere.

    His Masterpiece

    Emile Zola

  • Two fat ladies, open-mouthed, were yawning with satisfaction.

    His Masterpiece

    Emile Zola

British Dictionary definitions for open-mouthed


  1. having an open mouth, esp in surprise
  2. greedy or ravenous
  3. clamorous or vociferous
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