A quorum is the minimum number of members of a deliberative assembly (a body that uses parliamentary procedure, such as a legislature) necessary to conduct the business of that group. According to Robert's Rules of Order Newly Revised, Tenth Edition, the "requirement for a quorum is protection against totally unrepresentative action in the name of the body by an unduly small number of persons."
The term quorum is from a Middle English wording of the commission formerly issued to justices of the peace, derived from Latin quorum, "of whom", genitive plural of qui = "who". As a result, quor...