Definition of: armor

(är′mər) noun
1. A defensive covering, as of mail for a warrior, or of metallic plates for a war vessel, a tank, a deep-sea diver's suit, etc.
2. The aggregate of armored assault vehicles available to a military command.
3. Biol. The protective covering of various animals, as turtles, armadillos, and some fishes. See synonyms under ARMS.
—v.t. & v.i. To furnish with or put on armor. Also Brit. ar′mour. [<OF armeüre <L armatura. Doublet of ARMATURE.]