Pronunciation: (prē"kun-dish'un), [key]
something that must come before or is necessary to a subsequent result; condition: a precondition for a promotion.
to subject (a person or thing) to a special treatment in preparation for a subsequent experience, process, test, etc.: to precondition a surface to receive paint.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.