Pronunciation: (prē-pōz'), [key]
—v.t., -posed, -pos•ing. Gram.
to place (a grammatical form) before a related grammatical form: The adverb “out” of “put the light out” is preposed in “put out the light.”
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.