- The definition of an activist is someone who works to support a cause.
An example of an activist is someone who hands out pamphlets about environmental issues, reduces the amount of water, electric and gas that he/she uses and makes powerful speeches about the ways in which people need to take care of the environment.
activist definition by American Heritage Dictionary
- Of, relating to, or engaged in activism.
- Of, relating to, or being an activist.
Variant of activism
- activist adjective, noun