LEXICON /ˈlɛk.sɪ.kən/ ► audio Scrabble 16 Words With Friends 19 Definition noun a language user's knowledge of words. — synonyms: vocabulary, mental_lexicon noun a reference book containing an alphabetical list of words with information about them. — synonyms: dictionary Examples “a baseball lexicon” See all 69 words you can make from LEXICON → 7-letter words Words starting with L Words ending with N ← Unscramble different letters