American Dictionary

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Definition hum in American English

hum verb

verb
/hʌm/
1

to make musical sounds with your lips closed

Example

Jerry hummed softly to himself.

Example

If you don't know the words, just hum the tune.

Synonyms and related words
1.1

to make a low continuous sound

Example

The refrigerator hummed in the kitchen.

Synonyms and related words
2

if a place is humming, it is full of noise and activity

Example

The whole stadium was humming with excitement.

Synonyms and related words
Definition hum in American English