Conservation is when you keep something from running out — whether it's plants, animals, or resources. Your new conservation project, "Save the Pigeons," might not catch on as quickly as you'd hoped.

Conservation is closely related to preservation. Both are positive words that give an impression of care and attention. Your habit of never leaving the couch might sound more impressive if you refer to it as "energy conservation."

Definitions of conservation
  1. noun
    the preservation and careful management of the environment and of natural resources
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    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
    type of:
    preservation, saving
    the activity of protecting something from loss or danger
  2. noun
    an occurrence of improvement by virtue of preventing loss or injury or other change
    synonyms: preservation
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    type of:
    advance, betterment, improvement
    a change for the better; progress in development
  3. noun
    (physics) the maintenance of a certain quantities unchanged during chemical reactions or physical transformations
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    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
    type of:
    a basic truth or law or assumption
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