A quorum is the minimum number of members required to be present in a meeting or assembly to make the proceedings valid. This concept is essential in organizations, such as corporations and government bodies, to ensure that decisions reflect the will of a sufficient portion of the group. The specific number needed for a quorum can vary based on the rules or bylaws governing the organization. In many cases, a quorum is defined as a simple majority of the members. For example, if a board of directors has ten members, at least six must be present to conduct official business. Without a quorum, any decisions made may be considered invalid or unenforceable.