conservation

noun

1. The protection of nature, wildlife, and natural resources from damage or waste.

   B1

   uncountable

   • "The organization works on the conservation of endangered animals."B1

2. The careful and efficient use of resources to prevent waste.

   A2

   uncountable

   • "Turning off lights when not in use is a simple conservation measure."A2
   • "Water conservation is essential in regions affected by drought."B2

3. The careful preservation and protection of historic buildings, works of art, or other valuable objects.

   B2

   uncountable

   • "The museum is responsible for the conservation of the painting."B2
   • "The conservation of the ancient building requires specialist knowledge and expensive materials."C1

4. The scientific principle that a quantity, such as energy or mass, cannot be created or destroyed, although it may change form.

   C1

   usually in conservation of

   • "The law of conservation of energy says that energy cannot simply disappear."B2
   • "The experiment demonstrates the conservation of momentum in a closed system."C1