mental lexicon mentalize • mentally · · · Info · Definitions · Synonyms · Characters · · mental lexicon · · Text Common · · Latin · · Scripts 14 · · Length 5 · · Syllables Definitions · · · (noun) a language user's knowledge of words. Synonyms: vocabulary, lexicon, mental lexicon. · · Noun Definition 1 Synonyms · · · vocabulary · · Synonym 1 lexicon · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074 x latin small letter x U+0078