Source : Webster's Revised Unabridged Dictionary (1913)

   {Accumulation}, {Conservation}, {Correlation}, & {Degradation
   of energy}, etc. (Physics) See under {Accumulation},
      {Conservation}, {Correlation}, etc.

   Syn: Force; power; potency; vigor; strength; spirit;
        efficiency; resolution.

Conservation \Con`ser*va"tion\, n. [L. conservatio: cf. F.
   conservation.]
   The act of preserving, guarding, or protecting; the keeping
   (of a thing) in a safe or entire state; preservation.

         A step necessary for the conservation of Protestantism.
                                                  --Hallam.

         A state without the means of some change is without the
         means of its conservation.               --Burke.

   {Conservation of areas} (Astron.), the principle that the
      radius vector drawn from a planet to the sun sweeps over
      equal areas in equal times.

   {Conservation of energy}, or {Conservation of force} (Mech.),
      the principle that the total energy of any material system
      is a quantity which can neither be increased nor
      diminished by any action between the parts of the system,
      though it may be transformed into any of the forms of
      which energy is susceptible. --Clerk Maxwell.

Source : WordNet®

conservation
     n 1: an occurrence of improvement by virtue of preventing loss or
          injury or other change [syn: {preservation}]
     2: the preservation and careful management of the environment
        and of natural resources
     3: (physics) the maintenance of a certain quantities unchanged
        during chemical reactions or physical transformations