regiment

Short definition from Wiktionary

Noun

1. 1
   A unit of armed troops under the command of an officer, and consisting of several smaller units.
2. 2
   Rule or governance over a person, place etc.; government, authority.
3. 3
   The state or office of a ruler; rulership.
4. 4
   Influence or control exercised by someone or something (especially a planet).
5. 5
   A place under a particular rule; a kingdom or domain.
6. 6
   A regimen.

Verb

1. 1
   To form soldiers into a regiment.
2. 2
   To systematize, or put in rigid order.