Definition of energy conservation in English:

energy conservation

noun

mass noun
  • 1The prevention of the wasteful use of energy, especially in order to ensure its continuing availability.

    ‘the houses are designed with energy conservation and low maintenance costs firmly in mind’
    ‘a conscious decision to promote renewable fuels and energy conservation’
  • 2Physics
    The principle by which the total energy remains constant in a system that is not subject to external influence.