definition of
residual

[1] #1 residual a. [residuary] relating to or indicating a remainder; "residual quantity". wn

[2] #2 residual n. [remainder, balance, residue, residuum, rest] something left after other parts have been taken away; "there was no remainder"; "he threw away the rest"; "he took what he wanted and I got the balance". wn

[3] #3 residual n. (often plural) a payment that is made to a performer or writer or director of a television show or commercial that is paid for every repeat showing; "he could retire on his residuals". wn