4. (adj)unknown not known
"an unknown amount"; "an unknown island"; "an unknown writer"; "an unknown source"
5. (adj)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"
6. (adj)unknown not known to exist
"things obscurely felt surged up from unknown depths"
7. (adj)obscure, unknown, unsung not famous or acclaimed
"an obscure family"; "unsung heroes of the war"
8. (adj)strange, unknown not known before
"used many strange words"; "saw many strange faces in the crowd"; "don't let anyone unknown into the house"
Definition of 'unknown'
