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dic·tion·ar·y  audio  (dksh-nr) KEY  

NOUN:
pl. dic·tion·ar·ies
  1. A reference book containing an alphabetical list of words, with information given for each word, usually including meaning, pronunciation, and etymology.
  2. A book listing the words of a language with translations into another language.
  3. A book listing words or other linguistic items in a particular category or subject with specialized information about them: a medical dictionary.
  4. Computer Science
    1. A list of words stored in machine-readable form for reference, as by spelling-checking software.
    2. An electronic spelling checker.
ETYMOLOGY:
Medieval Latin dictinrium, from Latin dicti , dictin-, diction ; see diction


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The American Heritage® Dictionary of the English Language, Fourth Edition.
Copyright © 2000 by Houghton Mifflin Company.
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