simple past tense and past participle of switch on

(informal) Highly attentive and mentally engaged.

A device to turn electric current on and off or direct its flow. / A change or exchange.

(transitive) To exchange. / (transitive) To change (something) to the specified state using a switch. / (transitive, in modern times Southern US) To whip or hit with a switch.

(snowboarding) Pertaining to riding with the front and back feet swapped round compared to one's normal position. / (freestyle skiing) Pertaining to skiing backwards.

plural of switch

Third-person singular simple present indicative form of switch

(transitive) to turn a switch to the "on" position in order to start or enable a device / (idiomatic) to change one's expression or appearance as if by turning a switch

present participle of switch

Corporal punishment by use of a switch (twig or twigs). / Back-and-forth movement of an animal's tail, etc. / The transference of an investment from one fund to another.