1 the by-law was invalid because it infringed rights of common
illegitimate, incorrect, improper, unacceptable, inapplicable;
[Antonyms] valid, binding
2 the whole theory is invalid
false, untrue, inaccurate, faulty, fallacious, spurious, inadequate, unconvincing, unsound, weak, wrong, wrongly inferred, wide of the mark, off target;
informal off beam, out, way out, full of holes, bogus
[Antonyms] true, accurate
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