What does armory mean?
The definition of armory
Ar”mo*ry, n.; pl. Armories.
Etym: [OF. armaire, armarie, F. armoire, fr. L. armarium place for keeping arms; but confused with F. armoiries. See Armorial, Ambry.]

1 A place where arms and instruments of war are deposited for safe keeping.
2 Armor: defensive and offensive arms. Celestial armory, shields, helms, and spears. Milton.
3 A manufactory of arms, as rifles, muskets, pistols, bayonets, swords. [U.S.]
4 Ensigns armorial; armorial bearings. Spensplw.
5 That branch of hplwaldry which treats of coat armor. The science of heraldry, or, more justly speaking, armory, which is but one branch of heraldry, is, without doubt, of very ancient origin. Cussans.