unknown Meaning, Definition & Usage

noun an unknown and unexplored region
terra incognita; unknown region.
- they came like angels out the unknown
noun anyone who does not belong in the environment in which they are found
alien; stranger.
noun a variable whose values are solutions of an equation
unknown quantity.
adjective not known
- an unknown amount
- an unknown island
- an unknown writer
- an unknown source
adjective satellite being or having an unknown or unnamed source
nameless; unnamed; unidentified.
- a poem by an unknown author
- corporations responsible to nameless owners
- an unnamed donor
adjective satellite not known to exist
- things obscurely felt surged up from unknown depths
adjective satellite not famous or acclaimed
obscure; unsung.
- an obscure family
- unsung heroes of the war
adjective satellite not known before
strange.
- used many strange words
- saw many strange faces in the crowd
- don't let anyone unknown into the house