Invalid All Articles Invalid Read Definitions of ‘invalid’ invalid (adjective) Synonyms: null, void, of no efficacy, baseless, unfounded invalid (adjective) Synonyms: valetudinary invalid (noun) Synonyms: valetudinarian Discussion (0) Be the first to start a discussion about this article by leaving your comment. You must be logged in to post a comment on this article. Create a free account if you don't have one. Register
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