Open English Wordnet
Adjectives
(a)operationalpertaining to a process or series of actions for achieving a result“operational difficulties”, “they assumed their operational positions”
(s)functional, usable, useable, operable, operationalfit 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”
(s)operational, in operation, operatingbeing 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”