■ noun
1》 preservation or restoration of the natural environment and wildlife.
↘preservation and repair of archaeological, historical, and cultural sites and artefacts.
2》 careful use of a resource.
3》 Physics the principle by which the total value of a quantity remains constant in a system which is not subject to external influence.
Derivatives
~al adjective
~ist noun
Origin
ME: from L. conservatio(n-) , from conservare (see conserve ).