n. The act of installing.n. the act of installing (a person) or giving possession of an office, rank, or order, with the usual rites or ceremonies.n. The whole of a system of machines, apparatus, and accessories, sometimes including the buildings and gorounds on which they are located, when set up and arranged for practical working, as in electric lighting, transmission of power, etc..n. The whole of a military base, post, camp, outpost, etc., constructed and operated for support of military operations.