noun A reference work listing words or names from one or more languages, usually ordered alphabetically, explaining each term's meanings or senses, often also containing information on its etymology, pronunciation, usage, semantic relations, translations, as well as other relevant information. .mw-parser-output .defdate{font-size:smaller}
If you want to know the meaning of a word, look it up in the dictionary.
noun A synchronic dictionary of a standardised language held to only contain words that are properly part of the language.
noun A reference work on a particular subject or activity in which the entries are arranged alphabetically; an alphabetical encyclopedia.
a law dictionary
noun The collection of words used or understood by a particular individual.
noun Someone or something regarded as a repository or compendium of information.
walking dictionary
noun An associative array; a data structure where each value is referenced by a particular key, analogous to words and definitions in a dictionary (noun sense 1).