Definition of "hum" []

To emit a continuous low droning sound like that of the speech sound (m) when prolonged. (verb-intransitive)
To emit the continuous droning sound of a bee on the wing; buzz. (verb-intransitive)
To give forth a low continuous drone blended of many sounds: The avenue hummed with traffic. (verb-intransitive)
To be in a state of busy activity. (verb-intransitive)
To produce a tune without opening the lips or forming words. (verb-intransitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "hum" in a sentence

"-- There, d'ye hire, _Het Came_! she dwon't drean -- _hum, hum, hum_."
"He points out the parallel between the three formulae: _Om vagîśvari mum: Om maṇipadme hum: Om vajrapâṇi hum_."
"April didnt told us what they TALKED .. * hum hum** wink*: P"

Words like "hum"

action activeness activity ahem bum bumble buzz

cajole croon drone foreign terrorist organization fto go hem

humbug hummed humming hums make noise mumble noise

resound sing sound terrorist group terrorist organization