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Dictionaries and Encyclopaedias Guide

You can find many reference resources in the print and electronic collections.

  • General encyclopaedias are reference works that provide comprehensive but brief information on general or specialized subjects. The articles focus on major themes and are usually written by experts in the field.
  • Language dictionaries (general, bilingual, synonym and antonym dictionaries)
  • Specialized dictionaries and encyclopaedias. Find them directly in the subject guides by subject.

All of these publications are listed in www.a-z.lu, the catalogue of the Luxembourgish library network.



Dictionaries are located in the linguistics section on floor -2 of the Luxembourg Learning Centre (LLC).
Older publications can be found inside The Stacks on floor -2.

Some dictionaries can be borrowed (short loan for 2 weeks, can be extended).
Publications that are marked by a red sticker are only available for on-site consultation.


Dictionaries by language (general dictionaries, dictionaries of synonyms and antonyms):

In English: 423
In German: 433
In Luxembourgish: 437.94935
In French: 443
In Italian: 453
In Spanish and Portuguese: 463
In Latin: 473
In Greek: 483
Other languages (Chinese, Arabic…): 493

Bilingual dictionaries:

English-German 433
German-Luxembourgish 437.94935
English-Luxembourgish 437.94935
French-Luxembourgish 437.94935
English-French 443
German-French 443
French-Arabic 493
French-Chinese 495.13
German-Chinese 495.13

To access electronic resources, log-in with your library number that’s indicated on the back of your library card (K-xxxxxx) and your password.

German dictionaries and encyclopaedias :

Brockhaus Enzyklopädie

This German encyclopaedia consists of a lexical inventory that contains approximately 300 000 entries.


Duden reference manuals offer short and concise explanations on language-related matters and on specific subjects, such as business, law and medicine.

English dictionaries and encyclopaedias :

Credo Reference

This resource gives access to over 500 publications, including encyclopaedias and dictionaries on various topics.

Encyclopædia Britannica Academic Edition

The online edition of this encyclopaedia gives access to the full text of the current print edition with over 75 000 articles from 4 300 authors as well as approximately 12 500 contributions of the «Britannica Books of the Year» series.

Oxford English Dictionary (OED)

Guide on the meaning, history and pronunciation of 600 000 words – past and present.

French dictionaries and encyclopaedias :

Encyclopædia Universalis

The Encyclopaedia Universalis constitutes the largest certified encyclopaedic collection in French language on the Internet, written and validated by more than 7.000 world-renowned authors. It offers animations, introductory dossiers on today's major issues, interactive sequences, dozens of interviews with personalities from the scientific and cultural world.

Que sais-je ?

This encyclopaedic collection covers all fields of knowledge: law-politics, economics, history-geography, art, literature, philosophy, psychology, religion, science and society.  Each title provides a rigorous overview of the subject, written by renowned researchers and specialists.

The following resources are available for free online.

German language


The online dictionary offers comprehensive information on the spelling, grammar and meaning of a German word. It also explains the correct use, pronunciation and origin of a word and lists its synonyms.


Defining dictionary for German and translating dictionary for 20 languages. Translation assistant.


Bilingual dictionary into 9 languages. Grammar guide for German.

English language


English dictionary that also provides synonyms; the first known use of a word and the history and etymology of a word; a thesaurus (a list of words that allows you to search for synonyms, antonyms, related words and idiomatic expressions).

Cambridge Dictionaries Online

English dictionary that provides, among other things, idiomatic expressions in British and American English from three English dictionaries: Cambridge Advanced Learner's Dictionary, Cambridge Academic Content Dictionary and Cambridge Business English Dictionary. Translating dictionary into more than 20 languages. Translation assistant. Grammar guide.

Collins Dictionary

English language dictionary, dictionary of synonyms. Translating dictionary into 7 languages (French, Hindi, Chinese, Italian, Spanish, German and Portuguese).  Translation assistant. Grammar guide. Thesaurus.

French language

Dictionnaire Larousse

Modern dictionary that offers definitions in French. Also offers bilingual dictionaries, dictionary of synonyms, a conjugation assistant and an encyclopaedia.


Extensive portal dedicated to the French language providing various dictionaries, corpora and linguistic tools.


Dictionary of synonyms developed by the University of Caen.

Les Dictionnaires

Specialised dictionaries (argot, citations, acronyms, conjugation…).

Luxembourgish language


Luxembourgish dictionary in which Luxembourgish words are translated into German, French, English and Portuguese and illustrated in Luxembourgish.

Bilingual dictionaries


Bilingual dictionary for 25 languages.


Bilingual dictionary for 28 languages.


Bilingual dictionary.


Bilingual dictionary into 15 languages, synonyms. Spelling and grammar checker in French and English. Conjugator in 10 languages. Grammar guide in French and English. Collaborative dictionary (words and expressions added by users, with translations, definitions, examples). Translation assistant.


Bilingual dictionary for 25 languages and  translation assistant.