key off
C1 neutral separable both
In simple words
To use something as a signal to start doing something, or to turn something off with a key.
Literal meaning: To switch something off using a key.
Meanings
1 C1
idiomatic
neutral
To take a cue or signal from something in order to coordinate a response or action.
"The dancers were told to key off the drummer's downbeat at the start of each section."
Grammar: inseparable
2 B2 neutral
To switch a device or system off using a key or keyed mechanism.
"The security guard keyed off the alarm panel before entering the building."
Grammar: separable
Usage notes
In performance, sport, and technical contexts, 'key off' means to react to a specific signal or cue. Also used literally to mean switching a device off with a key. Less common than related phrasal verbs.
Commonly used with
signal cue sound movement rhythm action
Forms
Base
key off
I/you/we/they
3rd person
keys off
he/she/it
Past simple
keyed off
yesterday
Past participle
keyed off
have + pp
-ing form
keying off
continuous
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Synonyms
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