In operation; that operates. / Involved in an operation.

present participle and gerund of operate

plural of operative

plural of operation

An operative person or thing. / (psychology) Any of a class of behaviors that produce consequences by operating (i.e., acting) upon the environment.

That operates to produce an effect.

Of or relating to operations, especially military operations. / Functioning and ready for use. / Effective or operative. / Determined by means of practical measures.

Third-person singular simple present indicative form of operate

plural of opera

(medicine) Such that it allows an operation to take place.