Definition of: rip-rap

(rip′rap′) noun
1. Broken stones loosely thrown together for a foundation, as in deep water or on a soft bottom, or for a sustaining wall, as along a river bank; also, the stones used, or the foundation so made.
2. plural Artificial islands in Chesapeake Bay.
—v.t. –rapped, –rap·ping To make a rip–rap in or upon; strengthen with rip–raps.