Unknown | Mean of unknown in English Dictionary

/ˌʌnˈnoʊn/

• not known
1. a disease of unknown cause/origin
2. Much remains unknown about his early life.
3. Her music was previously unknown outside of Asia.
4. An unknown number of cases go unreported.
5. The victim's attacker was unknown to her.
6. For some unknown reason, my computer crashed.
• not well-known
1. an unknown artist/writer
2. a book of unknown poems
• without being known about by (someone)
1. Unknown to me, my partner was organizing a surprise party for my birthday.
• Noun

• a place, situation, or thing that you do not know about or understand
1. explorers venturing off into the unknown
2. A fear of the unknown kept her from changing jobs.
• a person who is not famous or well-known
1. The director cast an unknown in the lead role.
• something that is not known or not yet discovered
1. We're facing too many unknowns.
2. (chiefly US) The big unknown [=the important thing that everyone would like to know] is how investors will react.
• a quantity that is not known and that is usually shown in equations as a letter (such as x, y, or z)