adjective, mold·i·er, mold·i·est.

overgrown or covered with mold.
musty, as from decay or age.
Informal. old-fashioned; outmoded: moldy ideas about higher education.

Origin of moldy

Middle English word dating back to 1350–1400; see origin at mold2, -y1
Related formsmold·i·ness, nounun·mold·y, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for moldy

putrid, rotting, rotten, funky, smelly, stale, dirty, stuffy, airless, mildewed

Examples from the Web for moldy

Contemporary Examples of moldy

Historical Examples of moldy

British Dictionary definitions for moldy


adjective moldier or moldiest

the US spelling of mouldy
Derived Formsmoldiness, noun
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

Word Origin and History for moldy

also mouldy, 1570s, earlier mowly (late 14c.), from mold (n.2) + -y (2). Related: Moldiness.

Online Etymology Dictionary, © 2010 Douglas Harper