The nineteenth century saw a new wave of dictionaries, many of which remain household names. Those dictionaries didn’t just store words; they represented imperial ambitions, nationalist passions, religious fervour, and utopian imaginings. The Whole World in a Book explores a period in which globalization, industrialization, and social mobility were changing language in unimaginable ways. Dictionaries in the nineteenth century became more than dictionaries: they were battlefields between prestige languages and lower-status dialects; national icons celebrating the language and literature of the nation-state; and sites of innovative authorship where middle and lower classes, volunteers, women, colonial subjects, the deaf, and missionaries joined the ranks of educated white men in defining how people communicated and understood the world around them. This volume investigates dictionaries in the nineteenth century covering languages as diverse as Canadian French, English, German, Frisian, Japanese, Libras (Brazilian sign language), Manchu, Persian, Quebecois, Russian, Scots, and Yiddish.