—v.t. 1. to prevent injury, decay, waste, or loss of: Conserve your strength for the race. 2. to use or manage (natural resources) wisely; preserve; save: Conserve the woodlands. 3. Physics,Chem.to hold (a property) constant during an interaction or process: the interaction conserved linear momentum. 4. to preserve (fruit) by cooking with sugar or syrup.
—n. Often, conserves. a mixture of several fruits cooked to jamlike consistency with sugar and often garnished with nuts and raisins.