intransitive. To deteriorate; to spoil; to perish. Obsolete.

intransitive. To become or grow worse, deteriorate, fall off; to diminish; = impair, v. 2. Also with up.

intransitive. Of plants or their parts: to die, to wither. Obsolete.

intransitive. To spoil, become injured, ‘go bad’.

intransitive. To lose brightness, quality, or strength; to deteriorate, decline.

figurative. Of substances: To lose force, strength, or active qualities, to become ‘dead’, flat, vapid, or inactive.

intransitive. To lose the valuable properties or qualities; to become unfit for use; to deteriorate; to go bad, decay. Also transferred.

to go bad: (esp. of food) to decay, putrefy, ‘go off’. Cf. sense A. 1a.

to go wrong. Of food, etc.: To get into bad or unsound condition; to become unwholesome.

colloquial (originally and chiefly U.S.). to go in the tank. To go badly wrong; to fail, deteriorate; spec. (of an economy, share price, etc.) = tank…