It is best to think of TheSage as two different systems: a knowledge database and a multi-tool interface. The knowledge database consists of a tightly integrated English dictionary and thesaurus. The interface allows the user to extract information from the knowledge database in a variety of ways. This is accomplished by means of tools.
Using TheSage as a dictionary and thesaurus is extremely simple. Type a word and press enter. If the word exists and/or TheSage has a record of it, the screen will be filled with the definition(s) for that word. In order to view the thesaurus for a word, click on the red button to the left of that word. If you want to see the thesaurus that applies to a specific definition, click on the red button to the left of that specific definition.