what's the definition of conservation of energy?
<answer> The fundamental principle of physics that the total energy of an isolated system is constant despite internal changes Familiarity information. <context> Dictionary entry overview: What does conservation of energy mean? • CONSERVATION OF ENERGY (noun) The noun CONSERVATION OF ENERGY has 1 sense: 1. the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes Familiarity information: CONSERVATION OF ENERGY used as a noun is very rare.