n. 25B6; adjective
the law was invalid : (LEGALLY) VOID, null and void, unenforceable, not binding, illegitimate, inapplicable.
the whole theory is invalid : FALSE, untrue, inaccurate, faulty, fallacious, spurious, unconvincing, unsound, weak, wrong, wide of the mark, off target; untenable, baseless, ill-founded, groundless; informal off beam, full of holes.
binding, true.