1. Not in accordance with the fact or reality or actuality
2. Erroneous and usually accidental
3. Arising from error; SYN. mistaken.
4. Deliberately deceptive; SYN. hollow.
5. Designed to deceive
6. Inaccurate in pitch; SYN. off-key, sour.
7. (Used especially of persons) Not dependable in devotion or affection; unfaithful SYN. untrue.
8. Of a statement, untrue. Falseness is used in proving propositions by considering the negative of the proposition to be true, then making deductions until a contradiction is reached which proves the negative to be false and the proposition to be true.
(2000) Es hat sich im Usenet eingebürgert, falsche Behauptungen nicht einfach mit dem Wort "falsch" zu beantworten, sondern je nach Grad der Missbilligung eine oder mehrere Buchstabenpermutationen vorzunehmen: Das ist faslch, flashc, fsaclh, ...
In a false or faithless manner; treacherously