- 1conserve something to use as little of something as possible so that it lasts a long time Help to conserve energy by insulating your home.
- 2conserve something to protect something and prevent it from being changed or destroyed new laws to conserve wildlife in the area see also conservation
NAmE//kənˈsərv//Verb Forms present simple I / you / we / they conserve
he / she / it conserves
past simple conserved
-ing form conserving