to deactivate alarm

1 3.2

To turn an alarm off so it does not sound

phrasal verb

: desactivar alarma

Jeff marches briskly to his car and opens the door, forgetting to deactivate the alarm.

Examples

Of course, once your timer is up, you can just wave your hand over your iDevice to deactivate the alarm.

Blog text (18)
- Did you deactivate alarm? - Model 7010 doesn't have an alarm.

The Man from U.N.C.L.E. (2015)
Before leaving home, make sure to deactivate the alarm to avoid any unnecessary noise.
She remembered to deactivate the alarm before stepping out for her morning jog.
After the security check, he had to deactivate the alarm to allow the delivery team inside.

Synonyms

to turn off

vsto deactivate alarm

631 1.3

To stop a machine or device from working with a switch

focuses on making an alert system inactive rather than merely switching devices

to deactivate

vsto deactivate alarm

63 3.9

To make a device, system, or account stop working

refers specifically to stopping an alert system rather than any device

to inactivate

vsto deactivate alarm

4 5.8

To make something stop working

is used for stopping an alert system rather than general shutdowns

Surface Forms

deactivate alarm infinitive

deactivated alarm past

deactivated alarm past participle

deactivating alarm present participle

deactivates alarm third person singular

Morphology

deactivate + alarm

The meaning 'to turn off or disable an alarm system' is directly and transparently derived from combining 'deactivate' (to render inactive) with 'alarm' (a signaling device). This is a straightforward verb + object composition following normal English patterns, so a B1 learner who knows both constituents will readily infer the MWE's meaning.

Etymology

Deactivate alarm comes from the simple image of pressing a button or entering a code to stop a loud alarm. To deactivate something is to make it 'inactive' or 'off', so the phrase means to turn off or disable an alarm.