Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Muggy \Mug"gy\ (m[u^]g"g[y^]), a. [Compar. Muggier (m[u^]g"g[i^]*[~e]r); superl. Muggiest.] [Cf. Icel. mugga mist, mugginess. Cf. 4th Mold.]
Moist; damp; moldy; as, muggy straw.
Warm, damp, and windless; uncomfortably hot and humid; sultry; as, muggy air, weather.
Douglas Harper's Etymology Dictionary
1731, from mugen "to drizzle" (late 14c.), from a Scandinavian source such as Old Norse mugga "drizzling mist," possibly from PIE *meug- "slimy, slippery" (see mucus).
a. (context Of the weather, air, etc English) humid, or hot and humid.
Usage examples of "muggy".
And then, without even a bow to the box seats, out he went, a breath of fresh air in a muggy world.
It was sound, yes, but only sound on the muggy foundation of her ruining the machine in the first place.
A fire burned all across the horizon, and in the muggy air, the smoke billowed uncommonly black.
Then the rain lightened and it became warm and muggy and they walked through a woodlot into a field of green knee-high winter wheat.
If no one else were around the cat would now enter the kitchen which tonight was hot and muggy with a rank low tide smell hanging in the air, a seaboard reminder of what a swamp in summer smells like.
The sun was baking hot already and the street had quickly become muggy, and Redrick felt a burning sensation under his eyelids.
It was muggy and the first hesitant drops of rain were scattering on the sidewalk like little black stars.
The squat and ugly buildings were black with soot from the nearby tannery, and the muggy air smelt strongly of smoke and tannin.
Her dress was long and flowing, despite the muggy weather, and studded with semiprecious stones.
The unrelenting muggy heat weighed down on them, making sleep seem very tempting.
The room was hot and muggy with the shutters closed, but he knew better than to try and open them.
He had almost forgotten how much he had loved this country, with its crushing, empty silences, its cool woods and the hot, muggy, mosquito-ridden magic of its summers.
In spite of the warm, muggy air, her fingers felt cold, as though turpentine was still evaporating from her skin.
And God, but it sure was rose and pretty and called to him like a beacon as he flew through the muggy air, a sensation of freedom as damned incredible as it had been the first time he launched himself over twenty years ago.
It was as though the concrete had absorbed it during the day so as to vent throughout the muggy evening.