'in operation' definitions:

Definition of 'in operation'

(from WordNet)
adjective
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" [syn: operational, in operation(p), operating(a)]

Synonyms of 'in operation'

From: Moby Thesaurus

Words containing 'in operation'