Dictionary
pre•req•ui•site
Pronunciation: (pri-rek'wu-zit, prē-), [key]—
adj.
required beforehand:
a prerequisite fund of knowledge.
—
n.
something prerequisite:
A visa is still a prerequisite for travel in many countries. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.