Untrue definition

(1) (used especially of persons) not dependable in devotion or affection; unfaithful

"A false friend"

"When lovers prove untrue"

(2) Not accurately fitted; not level

"The frame was out of true"

"Off-level floors and untrue doors and windows"

(3) Not true to an obligation or trust

"Is untrue to his highest opportunity and duty"-Bruno Laske

(4) Not according with the facts

"Unfortunately the statement was simply untrue"