Definify.com
Webster 1913 Edition
Dictionary
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
.Webster 1828 Edition
Dictionary
dictionary
,Noun.