[ muhs-tee ]
/ ˈmʌs ti /

adjective, mus·ti·er, mus·ti·est.

having an odor or flavor suggestive of mold, as old buildings, long-closed rooms, or stale food.
obsolete; outdated; antiquated: musty laws.
dull; apathetic.


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Origin of musty

1520–30; perhaps variant of moisty (Middle English; see moist, -y1) with loss of i before s as in master


mus·ti·ly, adverbmus·ti·ness, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for mustiness

British Dictionary definitions for mustiness

/ (ˈmʌstɪ) /

adjective -tier or -tiest

smelling or tasting old, stale, or mouldy
old-fashioned, dull, or hackneyedmusty ideas

Derived forms of musty

mustily, adverbmustiness, noun

Word Origin for musty

C16: perhaps a variant of obsolete moisty, influenced by must ³
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