1. (

• unknown ,
• unknown_region ,
• terra_incognita

) an unknown and unexplored region; "they came like angels out the unknown" ;

2. (

• stranger ,
• alien ,
• unknown

) anyone who does not belong in the environment in which they are found ;

3. (

• unknown ,
• unknown_quantity

) a variable whose values are solutions of an equation ;

1. (

• unknown

) not known; "an unknown amount"; "an unknown island"; "an unknown writer"; "an unknown source" ;

2. (

• nameless ,
• unidentified ,
• unknown ,
• unnamed

) being or having an unknown or unnamed source; "a poem by an unknown author"; "corporations responsible to nameless owners"; "an unnamed donor" ;

3. (

• unknown

) not known to exist; "things obscurely felt surged up from unknown depths" ;

4. (

• obscure ,
• unknown ,
• unsung

) not famous or acclaimed; "an obscure family"; "unsung heroes of the war" ;

5. (

• strange ,
• unknown

) not known before; "used many strange words"; "saw many strange faces in the crowd"; "don't let anyone unknown into the house" ;