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English definition of “set sth off”

set sth off

phrasal verb with set
 
 
/set/ verb (setting, set, set)
to cause an activity or event, often a series of events, to begin or happen: Cheap money set off a boom in personal borrowing, especially against homes. The proposed sale has set off an avalanche of protest.
(Definition of set sth off from the Cambridge Business English Dictionary © Cambridge University Press)
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