noun pl. armories -·mor·ies

1. Obsolete armor or armorial bearings
2. a storehouse for weapons; arsenal
3. an aggregate of resources, etc.
4. ☆ a building housing the drill hall and offices of a National Guard unit
5. ☆ a place where firearms are made
6. heraldry

Etymology: altered, by assoc. with armor < OFr armoierie, science of heraldry < armoier, to blazon coats of arms < arme, arm