Access the most popular dictionary in the world while you surf the web with a convenient definition and synonym popup.
Definition Pop-Up Features Include:
• Click on a word while surfing the web to see Dictionary.com’s definition in a small pop-up
• Customize your dictionary popup to your liking - no other dictionary does this
• Choose a specialized definition for science and medical terms – all from definitive sources
• Sign for our popular Word of the Day email to help you boost your vocabulary