Main entry: operational
Definition: (military) of or intended for or involved in military operations
Antonyms: inactive, nonoperational
Definition: (military) not involved in military operations
Antonyms: inactive
Definition: not active physically or mentally
Antonyms: inactive
Definition: not engaged in full-time work
Antonyms: inactive
Definition: lacking activity; lying idle or unused
Antonyms: inactive
Definition: (pathology) not progressing or increasing; or progressing slowly
Definition: lacking in energy or will
Definition: (of e.g. volcanos) not erupting and not extinct
Antonyms: extinct
Definition: (of e.g. volcanos) permanently inactive
Antonyms: stative
Definition: ( used of verbs (e.g. `be' or `own') and most participial adjectives) expressing existence or a state rather than an action
Antonyms: passive
Definition: expressing that the subject of the sentence is the patient of the action denoted by the verb
Antonyms: inactive
Definition: not exerting influence or change
Antonyms: quiet
Definition: of the sun characterized by a low level of surface phenomena like sunspots e.g.
Antonyms: uneffective, ineffective, ineffectual
Definition: not producing an intended effect
Main entry: in operation, operating, operational
Definition: being in effect or operation
Usage: 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
Antonyms: inoperative
Definition: not working or taking effect
Main entry: usable, useable, functional, operable, operational
Definition: fit or ready for use or service
Usage: 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
Antonyms: unserviceable
Definition: not ready for service