speciousness speciously • speck · · · Info · Definitions · Synonyms · Characters · · speciousness · · Text Latin · · Script 12 · · Length Definitions · · · (noun) an appearance of truth that is false or deceptive; seeming plausibility. Synonyms: meretriciousness. Example: "The speciousness of his argument." · · Noun Definition 1 Synonyms · · · meretriciousness · · Synonym 1 Characters · · c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 u latin small letter u U+0075