Money laundering is the process of illegally concealing the origin of money, obtained from illicit activities such as drug trafficking, corruption, embezzlement or gambling, by converting it into a legitimate source. It is a crime in many jurisdictions with varying definitions. It is usually a key operation of organized crime.
In United States law, money laundering is the practice of engaging in financial transactions to conceal the identity, source, or destination of illegally gained money. In United Kingdom law, the common law definition is wider. The act is defined as "the process by which the proceeds of crime are converted into assets which appear to have a legitimate origin, so that they can be retained permanently or recycled into further criminal enterprises".
In the past, the term "money laundering" was applied only to financial transactions related to organized crime. Today its definition is often expanded by government and international regulators such as the US Office of the Comptroller of the Currency to mean "any financial transaction which generates an asset or a value as the result of an illegal act," which may involve actions such as tax evasion or false accounting. In the UK, it does not need to involve money, but any economic good. Courts involve money laundering committed by private individuals, drug dealers, businesses, corrupt officials, members of criminal organizations such as the Mafia, and even states.
As financial crime has become more complex and financial intelligence more important to combating international crime and terrorism, money laundering has become a prominent political, economic, and legal debate. Money laundering is ipso facto illegal; the acts generating the money almost always are themselves criminal in some way (for if not, the money would not need to be laundered).

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