1. makes a low continuous sound
Usage: third person singular present of ‘hum’
2. sings with closed lips without words
Usage: third person singular present of ‘hum’
3. shows busy activity
Usage: third person singular present of ‘hum’; informal

1. low continuous sounds
Usage: plural of ‘hum’

Examples

• The air conditioner hums quietly in the background.
• She hums her favorite tune while cooking dinner.
• The busy office hums with activity all day long.
• We could hear the hums of machinery from the factory.
• The bee hums as it flies from flower to flower.
• He always hums when he’s happy about something.
• The restaurant hums with conversation during lunch hour.