Pleasing to the eye; externally fair or showy; appearing beautiful or charming; sightly; beautiful.Superficially fair, just, or correct; appearing well; apparently right; plausible; beguiling: as, specious reasoning; a specious argument; a specious person or book.Appearing actual, or in reality; actually existing; not imaginary.Pertaining to species or a species.Synonyms Colorable, Plausible, etc. See ostensible.