- The definition of a conservationist is a person who works to protect animals or the Earth.
Someone who is trying to save animals and stop deforestation is an example of a conservationist.
conservationist definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a person who advocates the conservation of natural resources
conservationist definition by American Heritage Dictionary
One that practices or advocates conservation, especially of natural resources.