Examples from the Web for unknown
While Faal and Njie are in U.S. custody, the whereabouts of the other survivors is unknown.The Shadowy U.S. Veteran Who Tried to Overthrow a Country|Jacob Siegel|January 6, 2015|DAILY BEAST
The police suspect that the other unaccounted for 643,000 bitcoins, were removed from customer accounts via an unknown party.Japanese Bitcoin Heist ‘an Inside Job,’ Not Hackers Alone|Nathalie-Kyoko Stucky, Jake Adelstein|January 1, 2015|DAILY BEAST
Until recently, the hacker collective known as Lizard Squad was all but unknown.
I believe that my case is being interfered with by unknown elements inside Iran.An American Marine in Iran’s Prisons Goes on Hunger Strike|IranWire|December 18, 2014|DAILY BEAST
We are not concerned or jittered about an unknown candidate.
The common serpent was unknown to us; but with our voices alone we managed to make a formidable noise.Christmas Stories from French and Spanish writers|Antoinette Ogden
Determination and efficiency are not unknown in His Majesty's Navy.The Blocking of Zeebrugge|Alfred F. B. Carpenter
The defendant's whereabouts were unknown to us, your Honor, and the court allowed us to serve notice by publication.Lightnin'|Frank Bacon
The byssus is unknown to us, but the stuffs of Lyons are more valuable.A Philosophical Dictionary, Volume 1 (of 10)|Franois-Marie Arouet (AKA Voltaire)
To those who hold this opinion, the system of reverberating praise from one journal to another, must be unknown.The American Quarterly Review|Various
British Dictionary definitions for unknown
Word Origin and History for unknown
c.1300, "strange, unfamiliar" (of persons, places), from un- (1) "not" + past participle of know. Cf. Old English ungecnawen. In reference to facts, attested from early 14c. The noun meaning "unknown person" is recorded from 1590s.