definition of
unknown

[1] #1 unknown a. not known; "an unknown amount"; "an unknown island"; "an unknown writer"; "an unknown source". wn

[2] #2 unknown n. [unknown region, terra incognita] an unknown and unexplored region; "they came like angels out the unknown". wn

[3] #3 unknown s. [nameless, unidentified, unnamed] being or having an unknown or unnamed source; "a poem by an unknown author"; "corporations responsible to nameless owners"; "an unnamed donor". wn

[4] #4 unknown s. not known to exist; "things obscurely felt surged up from unknown depths". wn

[5] #5 unknown s. [obscure, unsung] not famous or acclaimed; "an obscure family"; "unsung heroes of the war". wn