set off verb 8set-off noun 6forms 3 verb8 •To leave; to set out; to begin a journey or trip.He set off in search of better opportunities. •To begin; to cause; to initiate.I had no idea that one simple comment would set off such a huge argument. •To cause to begin.When he started giggling, it set us all off too. •To put into an angry mood; to start (a person) ranting or sulking, etc.Don't set him off or he won't shut up all day. •To cause to explode, let off.What a tragedy, that someone would set off a bomb in a crowded place. •To enhance by emphasizing differences.Her plain white dress was set off by a bright red stole. •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. •To deface or soil the next sheet; said of the ink on a freshly printed sheet, when another sheet comes in contact with it before it has had time to dry. set-off noun6 •A counterclaim; a distinct claim filed or set up by the defendant against the plaintiff's demand. •Anything set off against another thing; a compensation, a counterbalancing circumstance.D. Jerrold I do not contemplate such a heroine as a set-off to the many sins imputed to me as committed against woman. •The situation where a bank or similar organisation repays itself money owed by an accountholder out of his or her account. •An offset. •The act of setting off on a journey; a departure, a start. •(old-fashioned) Something used to improve the appearance; a decoration, an ornament. formssetting off · sets off · set-offs