hum

Pronunciation

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Verb

Plain form hum

Third-person singular hums

Past tense hummed

Past participle hummed

Present participle humming

1. (intransitive) To make a sound you can make in your throat with your mouth closed. Often, this is done to make music without singing words.

   I used to hum the music from the Indiana Jones movies when I was a child.

2. (intransitive) A similar sound, such as one from a machine.

   The engine hummed as he started drove the car.

Noun

Singular hum

Plural hums

1. (countable) Hum is the sound of humming, or a sound like humming.

   I heard a low hum from the other room.