Moist, damp; mouldy, putrescent; humid, muggy.

Producing faintness; sickly; †having a sickly smell. Of the atmosphere: oppressive.

Of the atmosphere or weather: Like that of a closed up room; confined, stifling, without free circulation; the opposite of fresh.

Close. of the atmosphere. Obsolete.

Of weather, the atmosphere, a day, etc.: extremely humid; (unpleasantly) close and warm.

Chiefly English regional (northern and midlands). Humid, sultry, close; stifling. Also figurative.

Damp, moist. Of weather: damp and misty; muggy.

regional and colloquial. Of weather: foul, bad; (U.S.) humid, sticky, close.

Originally and chiefly English regional. Of weather: muggy, close; (also) foggy; damp. Cf. muggy, adj.1 1a.

Of inanimate natural objects, the weather, etc.: Gloomy, dismal. Of things, with respect to their growth, progress, or movement: Sluggish. Also di…

Originally U.S. Of the weather, a day, etc.: hot and humid; muggy.

Full of, characterized by, or suggestive of, languor (languor, n. 5 6); (in modern use esp.) characterized by pleasurable relaxation.

Moist, close, sultry.