An Airbase, sometimes referred to as a military airport or airfield, provides basing and support of military aircraft.
Some airbases provide facilites very like civilian airports. For example, RAF Brize Norton in Oxfordshire, England has a terminal which caters for passengers for the Royal Air Force's scheduled flights, e.g. the Tristar to the Falkland Islands.
Other structures and equipment are specific to military airfields, e.g.: