set off
SET OFF
/set ɒf/
To begin a journey.
Can also mean to cause an explosion or to trigger an alarm.
The story behind the word. The verb 'set' is one of the oldest in English. Combined with 'off', it originally meant to 'set oneself off' from a stationary point into motion.
Word relationships
- depart: Depart is more formal and often used for planes or trains.
- embark: Embark is very formal and usually refers to a long or important journey.
- arrive: Arriving is the end of the journey.
Commonly confused with
- set out: Set out is very similar but often implies a more planned or ambitious journey.
Collocations
- set off on a journey
- set off an alarm
- set off a chain reaction
Example sentences
- "We set off for the mountains at the crack of dawn." Starting a trip.
- "The smoke from the burnt toast set off the fire alarm." Accidentally triggering an alarm.
Memory hook
Think of a rocket 'setting off' from the launchpad. Set off to go.
When not to use
Don't use it for simply leaving a room; it implies a significant journey or start.
Fun facts
- In fashion, 'set off' means to make something look more attractive by contrast: 'That necklace really sets off your dress.'
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