A reference work containing an alphabetical list of words, with information given for each word, usually including meaning, pronunciation, and etymology, A reference work with a list of words from one or more languages, normally ordered alphabetically and explaining each word's meaning and sometimes containing information on its etymology, usage, translations, and other data, Hence, a book containing the words belonging to any system or province of knowledge, arranged alphabetically, verb_ transitive To look up in a dictionary, transitive To add to a dictionary, intransitive To appear in a dictionary