To keep in a safe or sound state; to save; to preserve; to protect.
- To protect from loss or harm; preserve: calls to conserve our national heritage in the face of bewildering change.
- To use carefully or sparingly, avoiding waste: kept the thermostat lower to conserve energy.
- To keep (a quantity) constant through physical or chemical reactions or evolutionary changes.
- To preserve (fruits) with sugar.
- To economize: tried to conserve on fuel during the long winter.
- A jam made of fruits stewed in sugar.