controller

Con*trol"ler, n. Etym: [From control, v.t.: cf. F. contrôleur.] 1. One who, or that which, controls or restraines; one who has power or authority to regulate or control; one who governs. The great controller of our fate Deigned to be man, and lived in low estate. Dryden. 2. An officer appointed to keep a counter register of accounts, or to examine, rectify, or verify accounts. [More commonly written controller.] 3. (Naut.) Defn: An iron block, usually bolted to a ship's deck, for controlling the running out of a chain cable. The links of the cable tend to drop into hollows in the block, and thus hold fast until disengaged.

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