Pronunciation enPR: grəmăt'ĭkəl, IPA (key): /ɡrəˈmætɪkəl/ Audio (US)(file) Adjective Positive grammatical Comparative more grammatical Superlative most grammatical If language is grammatical, it follows the normal grammar. If something is grammatical, it has to do with grammar(s). This section needs someone to add example sentences to it.Wikiwand - on Seamless Wikipedia browsing. On steroids.