Collins English Dictionary and Thesaurus (for BlueDict and MDict)

Dictionary Features:
 • Latest vocabulary, based upon Collins’ 2.5 billion word database
 • 6,000 biographical entries
 • Key expressions and example sentences
 • Usage notes give advice on using the right word in the right place
 • Cultural notes on life and language
 • Thousands of etymologies trace the roots of modern English
 • A clear design that makes this dictionary accessible and easy to use

Thesaurus Features:
 • Key synonyms for each sense, offering the most helpful alternative
 • Opposites provide you with another way of expressing yourself
 • A wide range of Idioms and phrases included
 • Related words to help you expand your vocabulary
 • Cross-references
 • Quotations add wit, sparkle and originality
 • Illustrative examples from real English show how the entry word is used
 • Usage and regional labels to help you identify areas of usage
 • Extensive coverage of English as an international language
 • 550 Subject word lists add an extra dimension to your vocabulary

Just like many other third-party apps, BlueDict is only a database "reader". So you need to get the databases (.MDX / .MDD files) then put them into /sdcard/BlueDict/Dicts or your specified path.