If you right-click on a word or meaning in the Visual Thesaurus display (command-click on Macintosh computers), you will see a "pop-up" menu that shows the various actions that can be taken on that word. Not all actions will be available on every word and/or meaning.
Pronounce Word. Hear the word spoken out loud. (Requires an Internet connection)
Search Internet. Use your default web browser to search the Internet for web sites that are related to this word. (Requires an Internet connection and an Internet browser)