Ten, hut! So you'd like the definition of military? Yes, Sir! The adjective military is used to describe anything related to the armed forces or soldiers.
Stemming from the Latin word for "soldier," military is a word that goes hand in hand with war. It's the military that protects a country's interests, lead by generals and powered by brave soldiers. When used as an adjective, military describes anything that's related to, well, the military: salutes, campaigns, uniforms, etc.