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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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