The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

            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.
      [1913 Webster]

   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.
      [1913 Webster]

WordNet (r) 3.0 (2006):

dictionary
    n 1: a reference book containing an alphabetical list of words
         with information about them [syn: dictionary, lexicon]

The Free On-line Dictionary of Computing (19 January 2023):

dictionary

   1. data dictionary.

   2. associative array.

   3. Free On-line Dictionary of Computing.


The Devil's Dictionary (1881-1906):

DICTIONARY, n.  A malevolent literary device for cramping the growth
of a language and making it hard and inelastic.  This dictionary,
however, is a most useful work.