untrue (Adjective) — Not according with the facts. ex. "unfortunately the statement was simply untrue"
untrue (Adjective) — Not true to an obligation or trust. ex. "is untrue to his highest opportunity and duty"
untrue (Adjective) — Not accurately fitted; not level. ex. "off-level floors and untrue doors and windows"
untrue (Adjective) — (used especially of persons) not dependable in devotion or affection; unfaithful. ex. "when lovers prove untrue"