From WordNet (r) 3.0 (2006):
pay off
v 1: yield a profit or result; "His efforts finally paid off"
2: eliminate by paying off (debts) [syn: liquidate, pay off]
3: pay off (loans or promissory notes) [syn: redeem, pay
off]
4: do or give something to somebody in return; "Does she pay you
for the work you are doing?" [syn: pay, pay off, make
up, compensate]
5: pay someone with influence in order to receive a favor [syn:
buy off, pay off]
6: take vengeance on or get even; "We'll get them!"; "That'll
fix him good!"; "This time I got him" [syn: pay back, pay
off, get, fix]