hum Meaning in Cambridge American English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of "hum" - American English Dictionary

See all translations

humverb [I/T]

 us   /hʌm/ (-mm-)
to make a continuous, low sound, or to sing a tune with closed lips: [I] Debbie always hums to herself when she listens to music. [T] I’ve forgotten how that tune goes – could you hum it for me? fig. If something is humming, it is very busy and full of activity: [I] Factories that make paper products are humming at 97% of capacity.

humnoun [C usually sing]

 us   /hʌm/
a continuous, low sound: We could hear the constant hum of traffic outside the window.
(Definition of hum from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of hum?
Add Cambridge dictionaries to your browser to your website

More American English definitions for “hum”

Definitions of “hum” in other dictionaries

Word of the Day
straight

the straight part of a racetrack (= the track on which competitors race)

Word of the Day

Are you a glass-half-full person? (Everyday Idioms)
Are you a glass-half-full person? (Everyday Idioms)
by Kate Woodford,
July 29, 2015
A reader of this blog recently asked for a post on idioms that are used in everyday English. This seemed like a reasonable request. After all, if you are going to make the effort to learn a set of English idioms, you want those idioms to be useful. The question, then, was

Read More 

exoskeleton noun
exoskeleton noun
July 27, 2015
a robotic device which goes around the legs and part of the body of a person who cannot walk and allows them to move independently and in an upright position The device, known as an exoskeleton, is strapped to the outside of a person’s limbs and can then be controlled by them.

Read More