- 1the unknown [singular] places or things that are not known about a journey into the unknown a fear of the unknown
Want to learn more?
Find out which words work together and produce more natural sounding English with the Oxford Collocations Dictionary app.
- 2[countable] a person who is not well known A young unknown played the leading role.
- 3[countable] a fact or an influence that is not known There are so many unknowns in the proposal.
- 4[countable] (mathematics) a quantity that does not have a known value X and Y in the equation are both unknowns.
Check pronunciation: unknown