1. Any of extremely large pelagic tropical rays that feed on plankton and small fish; usually, harmless but its size can make it dangerous if harpooned.
2. Several rays of the family Mobulidae, inhabiting tropical and subtropical seas and having a large flattened body, winglike pectoral fins, a whiplike tail, and two hornlike fins that project forward from the head.

Also called devilfish, manta ray, sea devil.

3. A blanket that is used as a cloak, shawl, or a horse blanket.
4. A rough-textured cotton fabric or blanket made and used in Spanish America and the southwest United States.
5. A movable military shelter formerly used to protect besiegers; such as, when attacking a fortress.