Meaning of dictionary

dic•tion•ar•y

Pronunciation: (dik'shu-ner"ē), [key]
— pl. -ar•ies.
  1. a book containing a selection of the words of a language, usually arranged alphabetically, giving information about their meanings, pronunciations, etymologies, inflected forms, etc., expressed in either the same or another language; lexicon; glossary: a dictionary of English; a Japanese-English dictionary.
  2. a book giving information on particular subjects or on a particular class of words, names, or facts, usually arranged alphabetically: a biographical dictionary; a dictionary of mathematics.
    1. a list of codes, terms, keys, etc., and their meanings, used by a computer program or system.
    2. a list of words used by a word-processing program as the standard against which to check the spelling of text entered.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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