Onset

• Onset (audio), the beginning of a musical note or sound
• Interonset interval, a term in music

• Syllable onset, a term in phonetics and phonology

• Onset, Massachusetts, village in the United States
• Onset Island (Massachusetts), a small island located at the western end of the Cape Cod Canal
• The Onset, Liverpool indie rock group formed by Mike Badger of the La's
• The Onset (album), a 2005 album by the band
• {{USS|Onset|SP-1224}}, a United States Navy patrol boat in commission from 1917 to 1918
• "Onset", a 2019 song by Haiku Hands

• Offset (disambiguation)

{{disambiguation}}