adj., -gi·er, -gi·est.
Warm and extremely humid.
[Probably from Middle English mugen, to drizzle, akin to Old Norse mugga, a drizzle.]
mugginess mug'gi·ness n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
