Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “hum”

See all translations

hum

verb
 
 
/hʌm/ ( present participle humming, past tense and past participle hummed)
SING [I, T] to sing without opening your mouth: She hummed to herself as she walked to school. I've forgotten the tune. Can you hum it to me?Singing in general
MAKE SOUND [I] to make a continuous, low sound: The computers were humming in the background.Sounds made by objects, movement or impact
be humming If a place is humming, it is busy and full of activity.Busy and activeHurrying and doing things quickly
hum noun [C] a low, continuous sound: the hum of traffic Sounds made by objects, movement or impact
(Definition of hum from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Definitions of “hum” in other dictionaries

Word of the Day

cold snap

a short period of cold weather

Word of the Day

Cleavage proves divisive in Cambridge’s words of 2014

by Alastair Horne,
December 19, 2014
​​​​ Other dictionaries may choose faddish novelties as their words of the year, but here at Cambridge, we like to do something different. We look for the words that have seen sudden surges in searches over the course of the year – words that have been baffling users of English and driven them

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More