How do you define define?

dictionary.com defines "define" as:

1. to state or set forth the meaning of (a Word, phrase, etc.)

2. to explain or identify the nature or essential qualities of

3. to fix or lay down definitely; specify distinctly: to define one's responsibilities.

4. to determine or fix the boundaries or extent of: to define property with stakes.

5. to make clear the outline or form of: The roof was boldly defined against the sky.

"Define" means to describe something or lay out the characteristics of something. If you want to define a Word, you say what it means.