Second Law of Thermodynamics

[noun]

One of three Laws of Thermodynamics, or laws relating to heat power. The Second Law is commonly referred to as the Law of Increased Entropy. During the conversion of energy from one form to another, some energy is lost to the process of conversion. Though the total energy is in fact conserved (see the First Law of Thermodynamics), a portion becomes unusable as it increases disorder and randomness within the system.