(intransitive, slang) To change, usually in regards to how one feels, thinks, or behaves.

present participle of switch up

simple past tense and past participle of switch off

simple past tense and past participle of Q-switch

A device that causes Q-switching. / The process of Q-switching.

To use a Q-switch on (a lasar).

(CB radio slang) The switch controlling one's radio equipment.

Synonym of change tack.

simple past tense and past participle of switch out

present participle of switch out