Definition of: militia

(mə·lish′ə) noun
1. A body of citizens enrolled and drilled in military organizations other than the regular military forces, and called out only in emergencies.
2. U.S. All able–bodied male citizens between eighteen and forty–five years of age not members of the regular military forces.
—organized militia U.S. The National Guard, Organized Reserves, the Naval Reserve, and the Marine Corps Reserve. [<L, military service <miles, militis]
—mi·li′tia·man (-mən) noun