noun all the weapons and equipment that a country has.
— synonyms: armory, armoury
noun a military structure where arms and ammunition and other military equipment are stored and training is given in the use of arms.
— synonyms: armory, armoury
noun a place where arms are manufactured.
— synonyms: armory, armoury
Examples
“He arrived with a large arsenal of cleansers and tools, and got right to work.”