WordWeb is available as a powerful Pro version and a cut down free version. The free version is used by millions of people from all over the world, many of whom may not be able to afford a commercial dictionary.
WordWeb Pro was originally just an add on for Compiler - the world's best puzzle maker since 1993. However it has since grown in a strong stand-alone product, regularly updated with new words and senses.

The WordWeb database is based on Princeton's WordNet project, however there are many thousands of corrections and additions to this base. The WordWeb database is also internationalized, and has information about pronunciations, derived forms, and numerous other features.

WordWeb Pro Features:
- NEW: One-click look up from almost any program, including MS word
- NEW: Tab pages to quickly check web references
- NEW: Bookmark words
- NEW: Highlights commonly used widely-understood words
- Find words matching a pattern
- Edit and add to the database
- Solve and find anagrams
- Copy results to the clipboard
- Cross-reference to other installed electronic dictionaries
- Search for words in a large number of optional extra word lists
- Add your own custom glossaries
- Configure for American, British, Canadian, Australian or Asian English
- Option to hide (default) or flag vulgar and offensive related words
- Reverse definition (full text) search
- Cross-links words that sound the same (homonyms)

The extensive up-to-date dictionary database features:

- Definitions and synonyms, including many compounds and proper nouns
- Word relations: find antonyms, parts or types, less specific words, etc.
- Over 126 000 synonym sets and 158 000 root words
- Search over 260 000 words, compounds and derived forms
- 70 000+ pronunciations, with pop-up hint pronunciation key
- 49 000 usage examples
- View alphabetically nearest words, suggestions for many misspellings

Download:

Code:
http://rapidshare.com/files/17558431..._Pro_v5.51.zip