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 [I/T]  /hʌm/ (-mm-) us  
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.

hum

noun [C usually sing]  /hʌm/ us  
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

guru

a religious leader or teacher in the Hindu or Sikh religion

Word of the Day

The way we move (Verbs for walking and running)

by Kate Woodford,
March 25, 2015
​​​ This week we’re looking at interesting ways to describe the way that people move. Most of the verbs that we’ll be considering describe how fast or slow people move. Others describe the attitude or state of mind of the person walking or running. Some describe both. Starting with verbs for walking slowly,

Read More 

crossfit noun

March 23, 2015
high-intensity strength training Two women in strappy dresses discussed how much weight they could snatch

Read More