Adjective untrue has 4 senses
  1. untrue, wrong - not according with the facts; "unfortunately the statement was simply untrue"; "the facts as reported were wrong"
    Antonym: true (indirect, via false)
  2. untrue - not true to an obligation or trust; "is untrue to his highest opportunity and duty"-Bruno Laske
    Antonym:
    faithful (indirect, via unfaithful)
  3. out of true, untrue - not accurately fitted; not level; "the frame was out of true"; "off-level floors and untrue doors and windows"
    Antonym: even (indirect, via uneven)
  4. false, untrue - (used especially of persons) not dependable in devotion or affection; unfaithful; "a false friend"; "when lovers prove untrue"
    Antonym: constant (indirect, via inconstant)
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