"armor" in the noun sense
1. armor, armour
protective covering made of metal and used in combat
2. armor, armour
a military unit consisting of armored fighting vehicles
3. armor, armour
tough more-or-less rigid protective covering of an animal or plant
"armor" in the verb sense
1. armor, armour
equip with armor
Source: WordNet® (An amazing lexical database of English)
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