look up any word, like bae:
 
1.
1. Not widely known
2. Unfamiliar.
3. An unknown number.
4. A favorite answer of Kiko's
Choo: When will we do the art contest?
Kiko: Unknown.
Choo: >.<
by Kiko February 02, 2004
 
2.
The coolest Counter-Strike player and level designer ever.
"UNKNOWN just pwned you"
by Eric C January 28, 2005
 
3.
The one clan that noone has any idea, who they are.
1) Are you even in a clan?
by P. Sherman March 12, 2005
 
4.
A race of beings that first appeared in Kingdom Hearts. Ansem was apparently one before he overtoke Riku's body. An unknown is not hard to spot, as they always wear a black, hooded rain coat and never show their faces unless forced to. Due to how they may be merely shells, they have also been known to be called NEO's or Non-Existent One's...
"Ansem?" - Goofy to Unknown
"That name sounds familiar..." -Unknown to Goofy
by Darkness Shade December 20, 2003