TheSage’s English Dictionary and Thesaurus is a free but comprehensive language reference system; it integrates a dictionary and thesaurus of the English language and it can look up words directly from almost any program (IE, Word, Firefox, Outlook, Thunderbird,… ).
The dictionary comprises: Multiple detailed definitions (+210,000). Examples of usage (+50,000). Phonetic transcriptions (+70,000). Encyclopedic information (geographical, historical, political…). Academic knowledge (medicine, biology…).
The thesaurus encompasses: Synonyms, antonyms, hypernyms, hyponyms, meronyms, holonyms…, Approximately 1,400,000 relationships between definitions.