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.