Definitions from Wiktionary ( )

▸ noun:  (military) A unit of armed troops under the command of an officer, and consisting of several smaller units; now specifically, usually composed of two or more battalions.
▸ noun:  (now rare, archaic) Rule or governance over a person, place etc.; government, authority.
▸ noun:  (obsolete) The state or office of a ruler; rulership.
▸ noun:  (obsolete) Influence or control exercised by someone or something (especially a planet).
▸ noun:  (obsolete) A place under a particular rule; a kingdom or domain.
▸ noun:  (obsolete, medicine) A regimen.
▸ verb:  (transitive) To form soldiers into a regiment.
▸ verb:  (transitive) To systematize, or put in rigid order.

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