Payback/ˈpeɪbæk/ Definition 1 of 3Pro Tip 1/3Expectation of return The term implies that the person who borrowed money is expected to return it. She reminded him about the payback for the loan. Pro Tip 2/3Not always money Sometimes, 'payback' refers to returning a favor, not just money. After helping him move, he owed me a payback. Pro Tip 3/3Moral obligation There's often a sense of personal duty associated with 'payback'. I feel a strong payback is due for their kindness.