Longman Dictionary of Contemporary English homepage

Topic: ENVIRONMENT AND WASTE

Date: 1300-1400
Language: Old French
Origin: conserver, from Latin conservare, from com- ( COM-) + servare 'to keep, guard'

conserve

1 verb
     
con‧serve1 [transitive]
1 to protect something and prevent it from changing or being damaged [= preserve]:
We must conserve our woodlands for future generations.
efforts to conserve fish stocks
2SGE to use as little water, energy etc as possible so that it is not wasted:
the need to conserve energy
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