Pronunciation: (klō'vur-lēf"), [key]
—n., pl. -leafs, -leaves,
a road arrangement, resembling a four-leaf clover in form, for permitting easy traffic movement between two intersecting high-speed highways. One highway passes over the other, and both are joined by a system of curved feeder roads permitting vehicles to enter and leave the highways.
shaped like or resembling a leaf or leaves of clover.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.