Marginal Utility The additional satisfaction a consumer gains from consuming one more unit of a good or service. Investopedia Says: For example, if you were really thirsty you'd get a certain amount of satisfaction from a glass of water. This satisfaction would probably decrease with the second glass, and then even more with the third glass. The additional amount of satisfaction that comes with each additional glass of water is marginal utility. Related Terms: Bernoulli's Hypothesis Economics Efficiency Principle Intertemporal Choice Law of Diminishing Marginal Utility Total Utility Utility |