Definition of "Conserve" :

noun: fruit preserved by cooking with sugar

verb: preserve with sugar

"Mom always conserved the strawberries we grew in the backyard."

verb: use cautiously and frugally

"Conserve your energy for the ascent to the summit."

verb: keep in safety and protect from harm, decay, loss, or destruction

"Children must be taught to conserve our national heritage."

verb: keep constant through physical or chemical reactions or evolutionary change

"Energy is conserved in this process."