The noun has 3 meanings:
Meaning #1:
a military unit consisting of armored fighting vehicles
Synonym: armor
Meaning #2:
protective covering made of metal and used in combat
Synonym: armor
Meaning #3:
tough more-or-less rigid protective covering of an animal or plant
Synonym: armor
The verb armour has one meaning:
Meaning #1:
equip with armor
Synonym: armor




