Relates to historical trades skilled in metalwork and crafting of combat equipment. The castle's armourer was also an expert in forging chainmail.
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Not Modern Usage
Mainly used in historical or fantasy contexts, not in everyday modern language. The fantasy novel described the armourer carefully etching runes into the breastplate.
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Cultural Depiction
Common in stories about knights and medieval warfare; think movies or role-playing games. In the movie, the hero visits the armourer before riding into battle.