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”