Definition of conservations:
(n) :
The act of preserving, guarding, or protecting; the keeping (of a thing) in a safe or entire state; preservation.
(n) :
Wise use of natural resources.
(n) :
(biology) The discipline concerned with protection of biodiversity, the environment, and natural resources
(n) :
(culture) The protection and care of cultural heritage, including artwork and architecture, as well as historical and archaeological artifacts
(n) :
(physics) lack of change in a measurable property of an isolated physical system (conservation of energy, mass, momentum, electric charge, subatomic particles, and fundamental symmetries)
(n) :
(biology) Genes and associated characteristics of biological organisms that are unchanged by evolution, for example similar or identical nucleic acid sequences or proteins in different species descended from a common ancestor