hum

Noun

• a humming noise
  • the hum of distant traffic
    

• 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

• 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
    

Verb

• make a low continuous sound
  • The refrigerator is humming
    

• sound with a monotonous hum

• be noisy with activity
  • This office is buzzing with activity
    

• sing with closed lips
  • She hummed a melody
    

Related words

• Synonyms: 
  humming , Harkat-ul-Mujahidin , HUM , Harkat ul-Ansar , HUA , Harkat ul-Mujahedeen , Al Faran , Movement of Holy Warriors , busyness , thrum , buzz , seethe