British standard spelling of armor.
"In Britain, they prefer to write armour rather than armor when referring to protective body covering."
In plain English: Armor is strong protection worn on your body to keep you safe from getting hurt.
"The knight put on his heavy armour before riding into battle."
British standard spelling of armor.
"In British English, soldiers wear heavy steel armour to protect themselves in battle."
In plain English: To armour something means to cover it with protective gear so that nothing can hurt it.
"The heavy rain did not armour them against the cold wind, so they quickly put on their jackets."
A surname.
"The famous general Sir Edward Armour led his troops into battle last year."