First class and Undiscriminating

Opposite meaning terms

First class noun - Mail that includes letters and postcards and packages sealed against inspection.

Show all Definitions

Undiscriminating is an antonym for first class in excellent topic.

Undiscriminating adjective - Not discriminating.

Show all Definitions

First class is an antonym for undiscriminating.

Cite this Source

Undiscriminating and First class. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/first_class/undiscriminating

First class & Undiscriminating. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/first_class/undiscriminating>.

Undiscriminating or First class. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/first_class/undiscriminating.

Google Ngram Viewer shows how "first class" and "undiscriminating" have occurred on timeline