Learn the meaning and usage of the verb classify , which means to divide things into groups or types according to some system or principle. Find synonyms, related words, pronunciation, and examples of classify in different contexts. High scoring IB Theory of Knowledge examples. See what past students did and make your TOK perfect by learning from examiner commented examples! classify definition: arrange or organize by categories. Check meanings, examples, usage tips, pronunciation, domains, related words. Learn how to use the verb classify to arrange things in groups according to common features, or to decide which type or group they belong to. See pictures, pronunciation, grammar, synonyms and more.