This document discusses dictionaries and their purpose. It begins by defining a dictionary as a listing of words from one or more languages, often in alphabetical order, which provides information like definitions, pronunciations, translations, and etymologies. It then lists the various reasons people use dictionaries, such as finding a word's meaning, pronunciation, part of speech, origins, and more. The document contrasts dictionaries and encyclopedias, noting that dictionaries focus on language and word definitions while encyclopedias provide more general knowledge on various topics. It provides examples of the differences in entries, compilation, and focus between the two reference sources.