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dic.tion.ar.y ( P ) Pronunciation Key (dksh-nr) n. pl. dic.tion.ar.ies
A reference book containing an alphabetical list of words, with information given for each word, usually including meaning, pronunciation, and etymology.

A book listing the words of a language with translations into another language.
A book listing words or other linguistic items in a particular category or subject with specialized information about them: a medical dictionary.
Computer Science.
A list of words stored in machine-readable form for reference, as by spelling-checking software.
An electronic spelling checker.
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[Medieval Latin dictinrium, from Latin dicti, dictin-, diction. See diction.]

Source: The American Heritage Dictionary of the English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

dictionary
Dic"tion*a*ry, n.; pl. Dictionaries. [Cf. F. dictionnaire. See Diction.] 1. A book containing the words of a language, arranged alphabetically, with explanations of their meanings; a lexicon; a vocabulary; a wordbook.

I applied myself to the perusal of our writers; and noting whatever might be of use to ascertain or illustrate any word or phrase, accumulated in time the materials of a dictionary. --Johnson.

2. Hence, a book containing the words belonging to any system or province of knowledge, arranged alphabetically; as, a dictionary of medicine or of botany; a biographical dictionary.

Source: Websters Revised Unabridged Dictionary, 1996, 1998 MICRA, Inc.

dictionary
n : a reference book containing an alphabetical list of words with information about them [syn: lexicon]

Source: WordNet 1.6, 1997 Princeton University

dictionary
dictionary: in CancerWEBs On-line Medical Dictionary

Source: On-line Medical Dictionary, 1997-98 Academic Medical Publishing & CancerWEB