muggy

UK: /ˈmʌgi/ US: /ˈmʌgi/ ,(mug′ē)

Inflections of 'muggy' (adj):

muggier

adj comparative

muggiest

adj superlative

WordReference Random House Learner's Dictionary of American English © 2026

mug•gy /ˈmʌgi/   adj., -gi•er, -gi•est. 

1. Meteorology (of the weather, etc.) uncomfortably humid;
   damp and close:
   a hot, muggy day.

mug•gi•ness, n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2026

mug•gy  (mug′ē), adj., -gi•er, -gi•est. 

1. Meteorology (of the atmosphere, weather, etc.) oppressively humid;
   damp and close.

• Scandinavian; compare Old Norse mugga mist, drizzle) + -y¹
• mug to drizzle (noun, nominal and verb, verbal) (1725–35

mug′gi•ly, adv. 
mug′gi•ness, n. 
Antonyms

dry.

Collins Concise English Dictionary © HarperCollins Publishers::

muggy / ˈmʌɡɪ/ adjective ( -gier, -giest)

1. (of weather, air, etc) unpleasantly warm and humid

Etymology: 18th Century: dialect mug drizzle, probably from Scandinavian; compare Old Norse mugga mist

ˈmugginess noun