Longman Dictionary of Contemporary English homepage

deactivate

verb
     
de‧ac‧ti‧vate [transitive]
to switch something, especially a piece of equipment, off or to stop it from being used any more [≠ activate]:
You need to type in a code number to deactivate the alarm.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary