switching on

Verb

switch on (third-person singular simple present switches on, present participle switching on, simple past and past participle switched on)

1. (transitive) To start or enable a device by turning a switch or a lever.

   Synonyms:

   start up, turn on

   Antonyms:

   shut off, switch off, turn off

2. (idiomatic) To change one's expression or appearance as if by turning a switch.
3. (slang) To arouse, to excite (sexually).

   Synonyms:

   switch up, turn on

   Antonyms:

   turn off