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[ UK /ʌnnˈə‍ʊn/ ]
[ US /ənˈnoʊn/ ]
NOUN
  1. an unknown and unexplored region
    they came like angels out the unknown
  2. a variable whose values are solutions of an equation
  3. anyone who does not belong in the environment in which they are found
ADJECTIVE
  1. not known to exist
    things obscurely felt surged up from unknown depths
  2. not known before
    used many strange words
    don't let anyone unknown into the house
    saw many strange faces in the crowd
  3. being or having an unknown or unnamed source
    an unnamed donor
    a poem by an unknown author
    corporations responsible to nameless owners
  4. not known
    an unknown source
    an unknown amount
    an unknown island
    an unknown writer
  5. not famous or acclaimed
    an obscure family
    unsung heroes of the war

How To Use unknown In A Sentence

  • Another tomb of interest (and of which we will speak in extenso in the next instalment of this series) is the tomb of the Pope Clement II, the only pope to be buried north of the Alps. The statue, sculpted by the same (unknown) sculptor as the Horseman, was originally the slab of the tomb, which remains on the west choir, behind the cathedra: Catholic Bamberg: The Cathedral
  • President Nixon devalues the dollar, journeys to Peking and Moscow; the future remains unknown.
  • However, for our purposes, we have used a working definition anchored on Haramiyavia, assuming that the unknown intersection between multituberculates and modern mammals is the appropriate break point.
  • For if I pray in an unknown tongue , my spirit prayer, but my understanding is unfruitful.
  • Adopting, the additional computative burden imposed by it notwithstanding, Schonfeld's modification of Airy's formulæ, he introduced into his equations a fifth unknown quantity expressive of a possible stellar drift in galactic longitude. Scientific American Supplement, No. 829, November 21, 1891
  • Whoever seeks to export such a system has to be aware of the unforeseeable consequences this model can have in an unknown environment.
  • This is common and in most cases the cause is unknown. The Sun
  • The cause of arteritis is unknown in many instances, but parasitic invasion and contiguous involvement of vessels in some inflammatory injuries are etiological factors. Lameness of the Horse Veterinary Practitioners' Series, No. 1
  • For the five years before her death his widow had donated an annual gift of £3,000 towards Burley - unknown to many in the village.
  • It was not unknown for an unexploded portion of an old charge to remain dormant but active for years under such conditions.
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