First class and Plain

Opposite meaning terms

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

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Plain is an antonym for first class in topics: excellent, wonderful, amazing.

Plain adjective - Free from all additions or embellishment.

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First class is an antonym for plain.

Nearby Words: plainly, plainness, plaint

Cite this Source

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

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

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

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