1. [Adjective]: of or intended for or involved in military operations

2. [Adjective]: pertaining to a process or series of actions for achieving a result; "operational difficulties"; "they assumed their operational positions"

3. being in effect or operation; "de facto apartheid is still operational even in the `new'' African nations"- Leslie Marmon Silko; "bus service is in operation during the emergency"; "the company had several operating divisions"

4. fit or ready for use or service; "the toaster was still functional even after being dropped"; "the lawnmower is a bit rusty but still usable"; "an operational aircraft"; "the dishwasher is now in working order"

1. operative

2. active

3. combat-ready

4. fighting(a)

5. effective

6. serviceable

1. nonoperational