environmentalist
nounUK /ɪnˌvaɪ.rənˈmen.təl.ɪst/
US /ɪnˌvaɪ.rənˈmen.t̬əl.ɪst/
A person who works to keep nature clean and safe.
The environmentalist planted trees and cleaned up the river.
RELATED WORDS
OTHER MEANINGS
2. Someone who studies how living things relate to their surroundings.
As an environmentalist, she studied how the forest animals depend on the trees.
3. A person who supports laws and rules that protect the earth.
The environmentalist spoke at the town meeting about cleaner air.
4. A member of a group that campaigns for a healthier planet.
The young environmentalist joined a club that picks up litter every weekend.