(intransitive) To explode. / (intransitive) To fire, especially accidentally. / (intransitive) To explode metaphorically; to become very angry. / (intransitive) To begin clanging or making noise.

start; beginning; commencement

present participle of go off

plural of go-off

(UK, Australia) Cease to boil when heat is no longer applied. / (idiomatic, UK, Australia) To lose interest; to pall. / (idiomatic, UK, Australia) To become of diminished intensity or urgency.

(idiomatic) Of a horse, to break suddenly into a gallop. / (idiomatic) Suddenly to say or do something impetuous.

(literally, derogatory) To leave an Indian reservation to which one was restricted. / (US, politics) To break with one's party or group, usually temporarily.

(Britain, colloquial) To launch into an animated diatribe, or passionate description or explanation of something.

To go hopelessly astray.

(of a firearm) To be discharged prematurely, or with the trigger at half cock. / (slang) To do or say something without due thought or care.