from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One that practices or advocates conservation, especially of natural resources.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A person who maintains natural areas or protects threatened species.
- n. Someone who advocates for these actions.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. someone who works to protect the environment from destruction or pollution
conservation + -ist (Wiktionary)