Chapters 9-11 of Fusion 2 discuss the writing modes of definition, process, and classification. Definition is explained as using synonyms, antonyms, context or history to formally state a word's meaning. Process details a series of chronological steps to achieve a result. Classification breaks a topic into distinct groups. Examples are provided for organizing each mode with transitions between steps or categories. A practice paragraph is identified as using the process mode by outlining brushing steps to remove hairballs. Another paragraph is recognized as using the classification mode by dividing smokers into groups. A final paragraph is deemed to employ definition by explaining the original meaning of "home" through context.