conservation

1. An occurrence of improvement by virtue of preventing loss or injury or other change (synset 107434199)
   is a type of: advance, betterment, improvement - a change for the better; progress in development
   same as: preservation
2. The preservation and careful management of the environment and of natural resources (synset 100820935)
   is a type of: preservation, saving - the activity of protecting something from loss or danger
   subtypes:

   • conservancy - the official conservation of trees and soil and rivers etc.
   • soil conservation - protection of soil against erosion or deterioration
   • oil conservation - the conservation of petroleum resources
   • water conservation - the conservation of water resources
3. (physics) the maintenance of a certain quantities unchanged during chemical reactions or physical transformations (synset 106113680)
   referred to in: natural philosophy, physics - the science of matter and energy and their interactions
   is a type of: principle - a basic truth or law or assumption
   subtypes:

   • conservation of charge, conservation of electricity - the principle that the total electric charge of a system remains constant despite changes inside the system
   • conservation of energy, first law of thermodynamics, law of conservation of energy - the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes
   • conservation of mass, conservation of matter, law of conservation of mass, law of conservation of matter - a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
   • conservation of momentum - the principle that the total linear momentum in a closed system is constant and is not affected by processes occurring inside the system
   • conservation of parity, mirror symmetry, parity, space-reflection symmetry - (physics) parity is conserved in a universe in which the laws of physics are the same in a right-handed system of coordinates as in a left-handed system

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