late 14c., from Anglo-French remainder, Old French remaindre, noun use of infinitive, a variant of Old French remanoir (see remain (v.)). The verb meaning "dispose of (books) at a reduced price" is from 1904. Related: Remaindered.
in Anglo-American law, a future interest held by one person in the property of another, which, upon the happening of a certain event, will become his own. The holder of this interest is known in legal terms as a remainderman.