Webster's English Dictionary

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armor

ar.mor or ar.mour \'a.r-m*r\ \-m*rd\ n [ME armure, fr. OF, fr. L armatura - 
   more at ARMATURE] chiefly Brit  1: defensive covering for the body; esp : 
   covering (as of metal) us ed in combat 2: a quality or circumstance that 
   affords protection  3a: a usu. metallic protective covering (as for a ship, 
   fort, airplane, or automobile) 3b: a protective covering (as a diver's 
   suit, the covering of a plant or animal, or a sheathing for wire, cordage, 
   or hose) 4: armored forces and vehicles  - armor vt