Definition of: residual

(ri·zij′·əl) adjective
1. Pertaining to or having the nature of a residue or remainder.
2. Left over as a residue.
—noun
1. That which is left over from a total mass, magnitude, or quantity which has been acted upon in any specified way; a remainder or remnant.
2. Stat. a The difference between observed results and those obtained by computation according to formula, b The difference between the value of a given observation and the mean of a series to which it belongs.
3. Often plural A payment made to a performer for each rerun of taped or filmed television material in which he or she has appeared.
—re·sid′u·al·ly adverb