say it: kahn-sur-VAY-shuhn
conservation is a noun meaning "an occurrence of improvement by virtue of preventing loss or injury or other change". It carries 3 recorded senses.
an occurrence of improvement by virtue of preventing loss or injury or other change
the preservation and careful management of the environment and of natural resources
(physics) the maintenance of a certain quantities unchanged during chemical reactions or physical transformations
physics
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for conservation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.