The act of preserving, guarding, or protecting; the keeping (of a thing) in a safe or entire state; preservation.
- The act or process of conserving.
- Preservation or restoration from loss, damage, or neglect: manuscripts saved from deterioration under the program of library conservation.
- The protection, preservation, management, or restoration of wildlife and of natural resources such as forests, soil, and water.
- The maintenance of a physical quantity, such as energy or mass, during a physical or chemical change.