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hum

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verb British English pronunciation: hum /hʌm/ 
Word Forms
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present tense
I/you/we/theyhum
he/she/ithums
present participlehumming
past tensehummed
past participlehummed

Related dictionary definitions

  1. 1
    [intransitive/transitive] Sound effect: hum to make musical sounds with your lips closed

    Jerry hummed softly to himself.

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

    1. a.
      [intransitive] to make a low continuous sound

      The fridge hummed in the kitchen.

  2. 2
    [intransitive] if a place is humming, it is full of noise and activity

    The whole stadium was humming with excitement.

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