Not known and Plain

Opposite meaning terms

Definitions of Not known not found.

Plain is an antonym for not known in hidden topic.

Plain adjective - Free from all additions or embellishment.

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Not known is an antonym for plain.

Nearby Words: plainly, plainness, plaint

Cite this Source

Plain and Not known. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/not_known/plain

Not known & Plain. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/not_known/plain>.

Plain or Not known. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/not_known/plain.

Google Ngram Viewer shows how "not known" and "plain" have occurred on timeline