- Duration: 9:15. English Grammar - Superlative Adjectives - biggest, best, most beautiful, etc. EnglishLessons4U - Learn English with Ronnie! Definition of bad_1 adjective in Oxford Advanced Learner's Dictionary. In English, comparative and superlative adjectives are used to compare two or more things. [engVid] 573,548 views Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. In this guide, we’ll discuss the rules governing these comparatives and superlatives as well as a …