unknown
🇺🇸
/ˌʌnˈnəʊn/
🇬🇧
/ˌʌnˈnəʊn/
not known or recognized
The source of the sound remains unknown.
not famous or familiar
He was an unknown artist before his first exhibition.
not happening or existing before
It is not unknown for students to feel nervous before exams.
places or things not known about
Exploring the unknown can be both exciting and scary.
a person who is not famous
The director chose an unknown for the lead role.
a fact or influence not known
There are many unknowns in this situation.
a value that is not known
In math, we often solve for the unknown.