Definition of 'Market Failure'
An economic term that encompasses a situation where, in any given market, the quantity of a product demanded by consumers does not equate to the quantity supplied by suppliers. This is a direct result of a lack of certain economically ideal factors, which prevents equilibrium.
Investopedia explains 'Market Failure'
Market failures have negative effects on the economy because an optimal allocation of resources is not attained. In other words, the social costs of producing the good or service (all of the opportunity costs of the input resources used in its creation) are not minimized, and this results in a waste of some resources.
Take, for example, the common argument against minimum wage laws. Minimum wage laws set wages above the going market-clearing wage in an attempt to raise market wages. Critics argue that this higher wage cost will cause employers to hire fewer minimum-wage employees than before the law was implemented. As a result, more minimum wage workers are left unemployed, creating a social cost and resulting in market failure.