hummed

intransitive verb hummed, humming

1. to make a low, continuous, murmuring sound like that of a bee or a motor
2. to sing with the lips closed, not producing words
3. to give forth a confused, droning sound: a room humming with voices
4. Informal to be busy or full of activity

transitive verb

1. to sing (a tune, etc.) with the lips closed
2. to produce an effect on by humming: to hum a child to sleep

noun

1. the act of humming
2. a continuous, murmuring sound