- (idiomatic, intransitive) To leave; to begin a journey or trip.
- He set off in search of better opportunities.
- (idiomatic, transitive) To begin; to cause; to initiate.
- I had no idea that one simple comment would set off such a huge argument.
- (idiomatic, transitive) To cause to explode.
- What a tragedy, that someone would set off a bomb in a crowded place.
- (idiomatic, transitive) To make angry.
- Don't set him off or he won't shut up all day.
- (idiomatic, transitive) To offset, to compensate for: to reduce the effect of, by having a contrary effect.
- My taxes did not increase because the amount of my raise was set off by my losses in the stock market.
- 1881, Henry James, Jr., The Portrait of a Lady, Chapter XXXIX, in The Atlantic Monthly, Volume XLVIII, Number CCLXXXVI (August, 1881), Houghton, Mifflin, and Company, page 215:
- When a woman had made such a mistake, there was only one way to repair it,—to accept it. One folly was enough, especially it was to last for ever; a second one would not much set it off.
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