v. & n.
v. tr. (also absol.) 1 pay back (money or expenses). 2 reimburse (a person).
n. 1 an act of refunding. 2 a sum refunded; a repayment. refundable adj. refunder n.
[ ME in sense 'pour back', f. OF refonder or L refundere (as RE-, fundere pour), later assoc. with FUND ]