unknown

Reading level: medium

Estimated CEFR level: A2 — Elementary

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun an unknown and unexplored region
  2. noun anyone who does not belong in the environment in which they are found
  3. noun a variable whose values are solutions of an equation

Etymology

From Middle English *unknowen, *uniknowen, uniknowe, from Old English unġecnāwen (“unknown”), equivalent to un- + known.

In classic literature

Synonyms

unknown region, terra incognita

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