- set off
- 1) PHRASAL VERB When you set off, you start a journey.
[V P prep/adv] Nichols set off for his remote farmhouse in Connecticut...
[V P prep/adv] The President's envoy set off on another diplomatic trip...
[V P] I set off, full of optimism.
Syn:2) PHRASAL VERB If something sets off something such as an alarm or a bomb, it makes it start working so that, for example, the alarm rings or the bomb explodes.[V P n (not pron)] Any escape, once it's detected, sets off the alarm...
[V P n (not pron)] Someone set off a fire extinguisher...
[V n P] It could take months before evidence emerges on how the bomb was made, and who set it off.
Syn:3) PHRASAL VERB If something sets off an event or a series of events, it causes it to start happening.[V P n (not pron)] The arrival of the charity van set off a minor riot as villagers scrambled for a share of the aid...
[V P n (not pron)] If he attended a party without his wife, it set off a storm of speculation. [Also V n P]
Syn:4) PHRASAL VERB If something sets a person off, it makes them angry, or makes them remember something and they start talking a lot.[V n P] The smallest thing sets him off, and he can't stop talking about his childhood. [Also V P n (not pron)]
5) PHRASAL VERB If one colour, flavour, or object sets off another, it makes it look more attractive, often by providing a contrast.[V P n (not pron)] Blue suits you, sets off the colour of your hair.
English dictionary. 2008.