It is a reference book listing alphabetically the words of one language and showing their meanings

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Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A reference work containing an alphabetical list of words, with information given for each word, usually including meaning, pronunciation, and etymology.
• noun A reference work containing an alphabetical list of words in one language with their translations in another language.
• noun A reference work containing an alphabetical list of words in a particular category or subject with specialized information about them.
• noun A list of words stored in machine-readable form for reference, as by spelling-checking software.

from The Century Dictionary.

• noun A book containing either all or the principal words of a language, or words of one or more specified classes, arranged in a stated order, usually alphabetical, with definitions or explanations of their meanings and other information concerning them, expressed either in the same or in another language; a word-book; a lexicon; a vocabulary: as, an English dictionary; a Greek and Latin dictionary; a French-English or an English-French dictionary.
• noun Synonyms Glossary, Lexicon, etc. See vocabulary.
• Pertaining to or contained in a dictionary.

from the GNU version of the Collaborative International Dictionary of English.

• noun A book containing the words of a language, arranged alphabetically, with explanations of their meanings; a lexicon; a vocabulary; a wordbook.
• noun Hence, a book containing the words belonging to any system or province of knowledge, arranged alphabetically

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A reference work with a list of words from one or more languages, normally ordered alphabetically and explaining each word's meaning and sometimes containing information on its etymology, usage, translations, and other data.
• noun computing An associative array, a data structure where each value is referenced by a particular key, analogous to words and definitions in a physical dictionary.
• verb transitive To look up in a dictionary
• verb transitive To add to a dictionary
• verb intransitive To appear in a dictionary

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a reference book containing an alphabetical list of words with information about them

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Medieval Latin dictiōnārium, from Latin dictiō, dictiōn-, diction; see diction.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Medieval Latin dictionarium, from Latin dictionarius, from dictio ("speaking"), from dictus, perfect past participle of dīcō ("speak") + -arium ("room, place").

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Examples

• Creating a new dictionaryThe newly completed dictionary is a research tool that will help advance those studies because - as Gil Stein points out - it goes well beyond what the word dictionary might imply.

  Dictionary of Akkadian Language Links Modern Civilization with Ancient Origins

• Creating a new dictionaryThe newly completed dictionary is a research tool that will help advance those studies because - as Gil Stein points out - it goes well beyond what the word dictionary might imply.

  Dictionary of Akkadian Language Links Modern Civilization with Ancient Origins

• Creating a new dictionaryThe newly completed dictionary is a research tool that will help advance those studies because - as Gil Stein points out - it goes well beyond what the word dictionary might imply.

  Dictionary of Akkadian Language Links Modern Civilization with Ancient Origins

• Creating a new dictionaryThe newly completed dictionary is a research tool that will help advance those studies because - as Gil Stein points out - it goes well beyond what the word dictionary might imply.

  Dictionary of Akkadian Language Links Modern Civilization with Ancient Origins

• Creating a new dictionaryThe newly completed dictionary is a research tool that will help advance those studies because - as Gil Stein points out - it goes well beyond what the word dictionary might imply.

  Dictionary of Akkadian Language Links Modern Civilization with Ancient Origins

• Creating a new dictionaryThe newly completed dictionary is a research tool that will help advance those studies because - as Gil Stein points out - it goes well beyond what the word dictionary might imply.

  Dictionary of Akkadian Language Links Modern Civilization with Ancient Origins

• I noticed that Lach, in the dictionary translates as to be counted.

  An online Etruscan Dictionary has arrived

• The idea of a Slang dictionary is in many ways counterintuitive - or, one might say, a bit bonkers.

  TIME.com: Top Stories

• The term dictionary entry includes all vocabulary entries as well as all boldface entries in the separate sections of the back matter headed

  VERBATIM: The Language Quarterly Vol XV No 2

• This dictionary is awful to the point of worthlessness.

  Arabic Practical Dictionary: Arabic-English English-Arabic « Books « Literacy News

What do you call a reference book listing alphabetically the words of one language and showing their meanings?

Is a reference book that contains words with their meanings?