1 unknown /ˌʌnˈnoʊn/ adjective
1 unknown
Learner's definition of UNKNOWN
: not known
: not well-known : not famous

unknown quantity

see quantity

unknown to

: without being known about by (someone)
2 unknown /ˌʌnˈnoʊn/ noun
plural unknowns
2 unknown
plural unknowns
Learner's definition of UNKNOWN
the unknown : a place, situation, or thing that you do not know about or understand
[count] : a person who is not famous or well-known
[count] : something that is not known or not yet discovered
[count] mathematics : a quantity that is not known and that is usually shown in equations as a letter (such as x, y, or z)
Comments & Questions
Comments & Questions
What made you want to look up unknown? Include any comments and questions you have about this word.