'armor' definitions:

Definition of 'armor'

From: WordNet
noun
Protective covering made of metal and used in combat [syn: armor, armour]
noun
A military unit consisting of armored fighting vehicles [syn: armor, armour]
noun
Tough more-or-less rigid protective covering of an animal or plant [syn: armor, armour]
verb
Equip with armor [syn: armor, armour]