- switch
- 1
/swItS/ verb
1 (I, T) to change from one thing to another, usually suddenly(+ to): He used to play tennis, but now he's switched to golf. | switch sth to/from/away etc: Duval switched easily and fluently from French to English. | switch jobs/positions etc (=change from one job or position to another): switch sth to/from/away etc We can switch the meeting to Tuesday if you like. | switch your attention: Just switch your attention to the screen on your left.2 (T) to secretly remove one object and put another similar object in its place: Someone must have switched suitcases at the airport.3 (I) to help someone you work with who needs time away from the job by agreeing to work certain hours for them if they do the same for you: switch with sb: Can you switch with me on Monday night?4 (transitive always + adv/prep) to change the way a machine operates by using a switch: Switch the freezer to the `extra cold' setting.switch off phrasal verb1 (I, T) to turn off a machine, electric light, radio etc by using a switch: Don't forget to switch off when you've finished. | switch sth off: Can you switch the television off?—see open 22 (I) informal to stop listening or paying attention: He just switches off when you start talking to him.switch on phrasal verb (I, T) to turn on a machine, electric light, radio etc by using a switch: swith sth on: Can you switch the light on? —see open 2 switch over phrasal verb (I)1 to change completely from one method, product etc to another(+ from/to): A lot of banks are switching over to the new electronic system because it's more efficient.2 (I, T) BrE to change from one radio or television station to another: Switch over if you don't like the programme.2 noun (C)1 the part on a light, radio, machine etc that starts or stops the flow of electricity when you press it up or down: light switch: a light switch | the on/off switch | throw a switch (=pull a large switch): He threw a switch and all the lights in the theatre came on.2 a complete, and usually sudden, change from one thing to another: The switch to a free market economy will not be easy. | that's a switch AmE (=used to say that someone's behaviour is unusual for them): “Mark's doing the dishes tonight.” “That's a switch!”3 make the switch to secretly remove one object and put another similar object in its place: The original painting has been replaced by a fake, and no one knows when the switch was made.4 a thin stick that bends easily: a willow switch
Longman dictionary of contemporary English. 2004.