From Longman Dictionary of Contemporary Englishthe unknownthe unknowna) HANOT KNOWa place that is not known about or that has not been visited by humans The astronauts began their journey into the unknown. b) RFNOT KNOWthings that you do not know or understand a fear of the unknown → unknown
Examples from the Corpus
the unknown• Starting a new relationship with someone is always a journey into the unknown.• The astronauts began their journey into the unknown.• In 1492 Columbus and his group of tiny ships set off into the unknown.• a fear of the unknown• The fear of the unknown prevents many people from making significant changes in their lives. 