time switch
/ˈtaɪm swɪtʃ/
noun
- A device that automatically turns something on or off at a set time.
- The sprinkler system uses a time-switch to water the garden every morning.
- We installed a time-switch on the porch light so it turns on at dusk.
- The oven has a time-switch that starts cooking at 5 PM.
Synonyms