In operation and Ineffective
Opposite meaning terms
In operation
In operation adjective - Being in effect or operation.
Ineffective
Ineffective adjective - Not producing the desired result.
In operation is an antonym for ineffective.
Cite this Source
Ineffective and In operation. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/in_operation/ineffective
In operation & Ineffective. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/in_operation/ineffective>.
Ineffective or In operation. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/in_operation/ineffective.
Google Ngram Viewer shows how "in operation" and "ineffective" have occurred on timeline