1. a collection of weapons and military equipment stored by a country, person, or group: "Britain's nuclear arsenal"Similarweaponsweaponryarmsarmaments
▪ a place where weapons and military equipment are stored or made.Similararmoryarms depotarms cacheordnance depotmagazineammunition dump
Word Originearly 16th century (denoting a dock for the construction and repair of ships): from French, or from obsolete Italian arzanale, based on Arabic dār-aṣ-ṣinā‘a, from dār ‘house’ + al- ‘(of) the’ + sinā‘a ‘art, industry’.