To make a prolonged droning sound, as a bee in flight; drone; murmur; buzz.To give utterance to a similar sound, such as the droning of a tune, a contemptuous or vacant mumbling, a murmuring expression of applause or satisfaction, hesitation, dissent, etc.Same as hem.To sing with shut mouth, as to the sound m; murmur without articulation; mumble: as, to hum an air.To express approbation of, or applaud, by humming.n. Any inarticulate, low, murmuring, or buzzing sound, as that made by bees in flight, by a spinning top, etc.; a faint continuous sound having no definite pitch; a buzz.n. Specifically— A low confused noise, as of a crowd, or of distant voices or sounds of any kind.n. A buzz or murmur of applause or approbation.n. A sound uttered with closed mouth by a speaker in a pause from embarrassment, affectation, or the like: as, hums and haws. Also (and now more commonly) hem.n. A drink formerly common, probably made of strong ale or of ale and spirit. Its exact composition is not known.An interjectional, hesitating sound, uttered with or during a pause; hem; h'm.To trick or delude; impose on; cajole.n. An imposition or hoax; a humbug.