Memorandum of Understanding (MOU) A legal document outlining the terms and details of an agreement between parties, including each parties requirements and responsibilities. Investopedia Says: The MOU is often the first stage in the formation of a formal contract. An MOU is far more formal then a handshake and is given weight in a court of law should one party fail to meet the obligations of the memorandum. Related Terms: Gentleman's Agreement Heads of Agreement Hell or High Water Contract Obligation Prospectus |