Other forms: environmentalists
An environmentalist is somebody who works to protect the natural world. A lifelong environmentalist, environmentalists warned, an environmentalist group.
The word covers everybody from a hedge-planting volunteer to a scientist to a protester, which is why it means so little without context. It was rare before the 1960s and is now in every news report.
1nounenvironmentalistSomebody who works to protect the natural world.
“The environmentalist chained herself to a tree to stop it being cut down.”
environmentalist is a person.
From environmental + -ist.
Etymology from Wiktionary, CC BY-SA