Quorum/ˈkwɔːrəm/ Definition 1 of 2Pro Tip 1/3Numerical Importance Understand quorum as a specific number, not just any attendance. The bylaws state that one-third of the members constitute a quorum. Pro Tip 2/3Meeting Validity A meeting without a quorum can still occur but can't make binding decisions. We held the meeting but couldn't vote without a quorum. Pro Tip 3/3Varies by Group Quorum size changes with the group's rules; it's not always a majority. Our club's quorum is 10 people, even though we have 50 members.