unsubstantial

  1. lacking material form or substance; unreal

    Synonyms : insubstantial, unreal

unmindful

  1. not mindful or attentive

    Synonyms : forgetful, mindless
    Antonyms : mindful
    Examples :
    • while thus unmindful of his steps he stumbled
  2. (followed by `to' or `of') lacking conscious awareness of

    Synonyms : oblivious
    Examples :
    • not unmindful of the heavy responsibility

usher

  1. someone employed to conduct others

    Synonyms : guide
    Type Of : escort
  2. take (someone) to their seats, as in theaters or auditoriums

    Synonyms : show
    Type Of : direct, guide, lead, take, conduct
    Examples :
    • The usher showed us to our seats
  3. an official stationed at the entrance of a courtroom or legislative chamber

    Synonyms : doorkeeper
    Type Of : official, functionary
  4. Irish prelate who deduced from the Bible that Creation occurred in the year 4004 BC (1581-1656)

    Synonyms : james usher, james ussher, ussher

unreliable

  1. not worthy of reliance or trust

    Synonyms : undependable
    Antonyms : reliable
    Examples :
    • in the early 1950s computers were large and expensive and unreliable
  2. liable to be erroneous or misleading

    Synonyms : undependable
  3. dangerously unstable and unpredictable

    Synonyms : treacherous
    Examples :
    • an unreliable trestle
  4. lacking a sense of responsibility

upend

  1. become turned or set on end

    Type Of : overturn, tip over, tump over, turn over
    Examples :
    • the airplanes upended
  2. set, turn, or stand on end

    Type Of : lay, set, put, place, pose, position
    Examples :
    • upend the box and empty the contents

unspoilt

  1. not left to spoil

    Synonyms : good, unspoiled

unclad

  1. having removed clothing

    Synonyms : unappareled, unattired, undressed, ungarbed, ungarmented

upon

  1. On; -- used in all the senses of that word, with which it is interchangeable.

unconditional

  1. not conditional

    Synonyms : unconditioned
    Antonyms : conditional
    Examples :
    • unconditional surrender
  2. not modified or restricted by reservations

    Synonyms : categoric, categorical, flat
  3. not contingent; not determined or influenced by someone or something else

unique

  1. radically distinctive and without equal

    Synonyms : alone, unequaled, unequalled, unparalleled
    Examples :
    • Bach was unique in his handling of counterpoint
  2. the single one of its kind

    Synonyms : singular
    Examples :
    • the unique existing example of Donne's handwriting
    • a unique copy of an ancient manuscript
    • certain types of problems have unique solutions
  3. (followed by `to') applying exclusively to a given category or condition or locality

    Examples :
    • a species unique to Australia
  4. highly unusual or rare but not the single instance

    Examples :
    • spoke with a unique accent
    • had unique ability in raising funds
    • a frankness unique in literature
    • a unique dining experience