hum meaning and definition

HUM noun

Definition of hum (noun)

1. the state of being or appearing to be actively engaged in an activity
   • "they manifested all the busyness of a pack of beavers"; "there is a constant hum of military preparation"
   • synonyms: busyness
2. an Islamic fundamentalist group in Pakistan that fought the Soviet Union in Afghanistan in the 1980s; now operates as a terrorist organization primarily in Kashmir and seeks Kashmir's accession by Pakistan
   • synonyms: Al Faran, Harkat ul-Ansar, Harkat ul-Mujahedeen, Harkat-ul-Mujahidin, HUA, Movement of Holy Warriors
3. a humming noise
   • "the hum of distant traffic"
   • synonyms: humming

HUM verb

Definition of hum (verb)

1. sing with closed lips
   • "She hummed a melody"
2. be noisy with activity
   • "This office is buzzing with activity"
   • synonyms: buzz, seethe
3. sound with a monotonous hum
   • synonyms: thrum
4. make a low continuous sound
   • "The refrigerator is humming"