Collins COBUILD Advanced Learner's English Dictionary - ecologist

(ecologists) 1. An ecologist is a person who studies ecology. Ecologists argue that the benefits of treating sewage with disinfectants are doubtful. N-COUNT 2. An ecologist is a person who believes that the environment and natural resources should be preserved and used in a sensible way, rather than being wasted. In the opinion polls the ecologists reached 20 per cent. N-COUNT