Pronunciation: (pā'bak"), [key]
1. the period of time required to recoup a capital investment.
2. the return on an investment: a payback of 15 percent tax-free.
3. the act or fact of paying back; repayment.
4. something done in retaliation: a really vicious payback for years of being snubbed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.