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a light switch
an on-off switch
He flicked the intercom switch to his secretary.
Lily pressed the switch and plunged the room into darkness.
a major policy switch by Washington
He said the switch from electric to solar power would be made soon.
A switch to a high-fibre diet will help your digestion.
Last year he made the switch to boxing from kickboxing.
This is the British English definition of switch. View American English definition of switch.
very unpleasant or dirty