1. a person who works to protect and preserve the natural environment and wildlife

Examples

• The conservationist led efforts to protect the endangered species.
• Marine conservationists work to preserve ocean ecosystems.
• She became a conservationist after witnessing deforestation in the Amazon.
• The conservationist group lobbied for stricter environmental regulations.
• Wildlife conservationists established a sanctuary for injured animals.
• Local conservationists organized a beach cleanup event.
• The famous conservationist dedicated her life to saving elephants.