hum

a monotonous sound like that of an insect in motion we heard the hum of an outboard motor and a few minutes later the small craft came into sight Synonyms burr, buzz, chirr, churr, drone, purr, thrum, whir (also whirr), whiz (or whizz), zoom Related Words babble, coo, gasp, gurgle, hiss, moan, murmur, rustle, sigh, suspiration, susurration, susurrus, whisper; whish, zing, zip Near Antonyms bawl, howl, roar, scream, screech, shriek, squall, squeal, yelp, yell

1 to be copiously supplied one restaurant was humming with diners, while a neighboring eatery was practically empty Synonyms brim, bristle, bulge, burst, bustle, buzz, crawl, abound, overflow, pullulate, swarm, teemNear Antonyms lack, need, want

2 to fly, turn, or move rapidly with a fluttering or vibratory sound a helicopter hummed overhead Synonyms bumble, burr, buzz, drone, whirr, whish, whiz (or whizz), zip, zoomRelated Words chirr, churr; thrum; fizz, hiss, murmur, purr, rustle, sigh, sizzle, swish, whisper; coo, curr; wheeze, whistle, whoosh