From Longman Dictionary of Contemporary Englishexact revenge (on somebody)exact revenge (on somebody)if someone exactsrevenge, they punish a person who has harmed themLeonard was determined to exact revenge on his wife’s killer. →exactExamples from the Corpusexact revenge (on somebody)• In fact, the farmer was so mean to this young man he determined to exact revenge.• Instead of the children being the monsters, the parents become the monsters who threaten to take over and exact revenge.