Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “dictionary”

dictionary

noun [C] uk   /ˈdɪk.ʃən.ər.i/ us    /-er.i/
A1 a book that contains a list of words in alphabetical order and that explains their meanings, or gives a word for them in another language; a similar product for use on a computer: a French-English/English-French dictionary a bilingual/monolingual dictionary To check how a word is spelled, look it up in a dictionary.Reference books a book that gives information about a particular subject, in which the entries (= words or phrases) are given in alphabetical order: a biographical/science dictionary a dictionary of quotationsReference books
(Definition of dictionary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of dictionary?
Add Cambridge dictionaries to your browser to your website

Definitions of “dictionary” in other dictionaries

Word of the Day

underarm

(done by) moving the arm below shoulder level

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More