1. [ verb ] (music) sing with closed lips

"She hummed a melody"

Related terms: sing hummer
2. [ verb ] sound with a monotonous hum
Synonyms: thrum
Related terms: go
3. [ verb ] make a low continuous sound

"The refrigerator is humming"

Related terms: make_noise
4. [ verb ] be noisy with activity
Synonyms: buzz seethe

"This office is buzzing with activity"

Related terms: be teem buzz
5. [ noun ] (politics) 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: harkat-ul-mujahidin harkat_ul-ansar harkat_ul-mujahedeen hua movement_of_holy_warriors al_faran
Related terms: foreign_terrorist_organization Pakistan
6. [ noun ] the state of being or appearing to be actively engaged in an activity
Synonyms: busyness

"they manifested all the busyness of a pack of beavers" "there is a constant hum of military preparation"

Related terms: action
7. [ noun ] a humming noise
Synonyms: humming

"the hum of distant traffic"

Related terms: noise
Similar spelling:   Humm