The 240,000-entry World Book® Dictionary is a powerful language resource for home, school, and business from the editors of World Book Encyclopedia.
This is the ultimate Mac dictionary. Don't try any of these things with the built-in dictionary in your Mac:
• Double-click any word in a definition to find out that word's meaning
• Give voice commands ("Pronounce please" or "Read the definition")
• Get a list of words with similar spellings (handy if you're not sure how a word is spelled)
• Check the history drawer with a list of words you have looked up during that session
• Pronounce each word you look up automatically (set in preferences)
• Click to have the definition read out loud from beginning to end
• Open multiple windows to compare definitions
• Choose colors for different parts of the definition (eg synonyms in red)
Our favorite feature, and soon to be yours, is "Related Entries".