set off

Short definition from Wiktionary

Verb

1. 1
   To leave; to set out; to begin a journey or trip.
2. 2
   To begin; to cause; to initiate.
3. 3
   To cause to explode, let off.
4. 4
   To put into an angry mood; to start (a person) ranting or sulking, etc.
5. 5
   To enhance by emphasizing differences.
6. 6
   To offset, to compensate for: to reduce the effect of, by having a contrary effect.
7. 7
   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.

Noun

1. 1
   That which is set off against another thing; an offset.
2. 2
   That which is used to improve the appearance of anything; a decoration; an ornament.
3. 3
   A counterclaim; a cross debt or demand; a distinct claim filed or set up by the defendant against the plaintiff's demand.
4. 4
   The situation where a bank or similar organisation repays itself money owed by an accountholder out of his or her account.
5. 5
   An offset.