DEFINITION:

Military Aircrafts are classically divided into two main categories: combat aircrafts (fighters, bombers, attack, electronic warfare, maritime patrol and multirole combat types) designed to destroy enemy equipment using their own aircraft ordnance and non-combat aircrafts (military transport, airborne early warning and control, reconnaissance and surveillance and experimental ones. 

(Source: Wikipedia: https://en.wikipedia.org/wiki/Military_aircraft and PAE own elaboration)