Chosen as "Best Dictionary App" by the book "Best Android Apps: The Guide for Discriminating Downloaders", O'Reilly Media.

Free Dictionary is an English Dictionary that gives you English definitions, synonyms, pronunciation and spelling.
- Auto-suggestion
- Offline Database query when there is no network
- Wikipedia Integration
- Play quiz game
- Searched word on Google Images
- Search history

This application allows you to browse off-line dictionaries. This is useful when the Internet connection is not availabe (abroad, in the plane...)

Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia encyclopedia, Wikipedia encyclopedia, Hutchinson encyclopedia, examples from classic literature, pronunciations, word browser, glossary. Free access.

Application unofficial The Free Dictionary, thefreedictionary.

Langtolang Free English French And French English Dictionary with online lookup. It has auto-suggestion feature.

Offline English Italian Dictionary. Dizionario Inglese Italiano.
More than 57.600 words. FREE!

DictionaryForMIDs is a multi-purpose, offline dictionary application. Many dictionaries are available for automatic (may take a while) or manual installation, you can even create your own dictionary using tools from the website.

WordMate is an universal dictionary application.

http://wordmate.net

A game for both learners of the English language and for native English Speakers. This game of Hangman contains over 17 different topics. Also, includes a button that uses the google translate application to translate the word into the users language.

This is the basic version. it has two in game adds. The full version contains over 18 topics, over 600 words and will be updated regularly with new topics and words.

Offline English Hindi Dictionary. More than 27.400 words. FREE!

Offline English Greek dictionary. More than 37.500 words.
Αγγλο-Ελληνικό Λεξικό. Πάνω από 37.500 λέξεις. Δεν χρειάζεται σύνδεση στο internet!
FREE! ΔΩΡΕΑΝ!

Langtolang Free English Turkish And Turkish English Dictionary with online lookup. It has auto-suggestion feature.

Langtolang Free English Spanish And Spanish English Dictionary with online lookup. It has auto-suggestion feature.

Ultimate online dictionary with Wiki app for android 1.6+ Fully supports Moto Droid & Nexus 1. Can't find in dictionary? Find it on Wiki Wiki Wiki!

Features:
Droid & Nexus One Support
Text to Speech Keywords
Dictionary & Wiki as backup!
Dictionary Words Update Online
Dictionary find closest match
Now with THESAURUS!

Langtolang is a multilingual dictionary.

Langtolang Free English Italian and Italian English Dictionary with online lookup. It has auto-suggestion feature.

Learn Spanish vocabulary with word cards, pronunciation by native Spanish speakers and exercises to test what you have learned.

+ Clear audio recordings of native Spanish speakers.
+ Very easy to use!
+ Works offline! (data rates while in roaming are expensive. No internet connection needed).
+ You can practice anywhere you go
+ Compressed files to ensure fast download anywhere.

Recommended app for tourists and business people visiting Spain.

Offline English Japanese Dictionary. Over 210.000 words and expressions!
英和辞書 offline。単語、成句、熟語を21万!
FREE!

Offline English Chinese Dictionary. 英漢字典.
More than 48.300 words. FREE!

English-French offline dictionary

Convenient app to use the multitran.ru online dictionary.