Definitions

1. adjective

relating to or concerned with the relations and interactions between organisms and their environment, including other organisms and the physical environment

“The new housing development is designed with ecological considerations in mind.”

2. noun

the study of the relations and interactions between organisms and their environment

“She is a leading expert in ecological research.”

3. noun

the environment and the relationships between organisms and their environment

“The ecological balance of the forest is delicate and easily disrupted.”