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[muhg-ee] /ˈmʌg i/
adjective, muggier, muggiest.
(of the atmosphere, weather, etc.) oppressively humid; damp and close.
Origin of muggy
1725-35; mug to drizzle (noun and v.) (< Scandinavian; compare Old Norse mugga mist, drizzle) + -y1
Related forms
muggily, adverb
mugginess, noun
dry. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for muggy
Contemporary Examples
Historical Examples
  • Sunday was a cloudy, warm day, "muggy," so Captain Zeb described it.

    Keziah Coffin Joseph C. Lincoln
  • It was an intensely hot, muggy night, and the mosquitoes were thick.

    The Wreck of the Titan Morgan Robertson
  • It was a hot, muggy, August afternoon—Wednesday in Pittsburgh.

    The Circuit Riders R. C. FitzPatrick
  • I have heard it complained of as being rather wet and muggy.

  • It was a damp, muggy January evening when I journeyed to this suburban retreat.

    Mystic London: Charles Maurice Davies
  • Sunlight will never get through that muggy thick atmosphere!

    Creatures of the Abyss Murray Leinster
  • "It's getting too muggy to ride—or I'm getting too fat," he said, and patted his paunch.

    When the Owl Cries Paul Bartlett
  • Then they squeezed the water all out of it so it was kind of damp and muggy like.

    Roy Blakeley's Motor Caravan Percy Keese Fitzhugh
  • It had been sultry, the first of a long series of sticky, muggy days.

    Angel Island Inez Haynes Gillmore
British Dictionary definitions for muggy


adjective -gier, -giest
(of weather, air, etc) unpleasantly warm and humid
Derived Forms
muggily, adverb
mugginess, noun
Word Origin
C18: dialect mug drizzle, probably from Scandinavian; compare Old Norse mugga mist
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 muggy

1731, from mugen "to drizzle" (late 14c.), from a Scandinavian source, cf. Old Norse mugga "drizzling mist," possibly from PIE *meug- "slimy, slippery" (see mucus).

Online Etymology Dictionary, © 2010 Douglas Harper
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