Undefined and Unknown

Related words

Undefined adjective - Not seen or understood clearly.

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Unknown and undefined are semantically related In some cases you can use "Unknown" instead an adjective "Undefined".

Unknown adjective - Happening or existing without one's knowledge.

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Undefined and unknown are semantically related in pending topic. Sometimes you can use "Undefined" instead an adjective "Unknown".

Nearby Words: unknowable, unknowing

Cite this Source

Unknown and Undefined. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/undefined/unknown

Undefined & Unknown. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/undefined/unknown>.

Unknown or Undefined. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/undefined/unknown.

Google Ngram Viewer shows how "undefined" and "unknown" have occurred on timeline