<p><strong>Noun</strong></p><ul><li>The period of time required to recoup a capital investment.</li><li>The return on an investment: This fund yields a payback of 15 percent tax-free.</li><li>The act or fact of paying back; repayment.</li><li>Something done in retaliation: Excluding them from her wedding was a vicious payback for years of being snubbed.</li></ul><p><strong>Verb Phrase</strong></p><ul><li>To repay or return; pay off: Graduates from this program are successfully paying back their student loans.</li><li>To retaliate against or punish: She paid us back by refusing the invitation.</li><li>To requite.</li></ul><p><strong>End of Response</strong></p>