English Dictionary Software

Longman Dictionary of Contemporary English

• Over 6500 encyclopedic entries for people, places, organization, etc.
• The whole text of the Longman Language Activator – helps you to choose the right word or phrase to express your ideas in writing
• Over a million sentences from books, magazines, newspapers, etc. – gives you more sentences showing how almost all the words and phrases are used
• Every word pronounced in British and American English
• Interactive exercises, including practice for exams like CAE, CPE, FCE and IELTS, dictation exercises, etc.
• Pop-up dictionary – just point your mouse at a word on a web page or in a Word document to see an instant definition – without worrying about spelling or alphabetical order to find the word!
  

Merriam-Webster's Collegiate Dictionary

• American English
• Light version of dictionary
• No pronunciation
  

Cambridge Advanced Learners’ Dictionary

• Pronunciation included
• Thesaurus
  

Highly Recommended English Dictionary Software
I have tried all three dictionary software above. Longman Dictionary of Contemporary English is the most feature-rich dictionary software that I highly recommend. Longman Language Activator is very useful and acts like a thesaurus. The user interface is clean and user-friendly. The software is free with the physical copy of Longman Dictionary of Contemporary English.