conservation

/ˌkɑn·sərˈveɪ·ʃən/ n [U]

Definition

› Conservation is a plan for avoiding the unnecessary use of natural materials such as wood, water, or fuel: The university is saving $300,000 per year by its energy conservation efforts. › Conservation is also the protection of plants, animals, and natural areas, esp. from the damaging effects of human activity: wildlife conservation

(Definition of conservation n from the Cambridge Academic Content Dictionary © Cambridge University Press)