What does the term "quorum" refer to in an assembly?

The term "quorum" specifically refers to the minimum number of members required to be present in order to conduct official business in an assembly. This concept is crucial in parliamentary procedure as it ensures that a sufficient number of members are present to make decisions that reflect the will of the group, thus maintaining the integrity of the decision-making process. Without a quorum, any decisions or votes taken may be considered invalid or illegitimate, as they may not accurately represent the entire membership.

In the context of the other options, a group of members who refuse to attend does not apply to the concept of quorum, as it focuses on attendance, not necessary participation. The total number of members in a society does not define quorum but relates more to overall membership rather than the threshold needed for action. Lastly, a two-thirds majority applies to voting outcomes and is a separate component of parliamentary rules, specifically concerning the level of support required for certain motions, not the minimum attendance necessary to operate. Thus, the definition of quorum is pivotal in understanding parliamentary procedure and ensuring that meetings are conducted fairly and effectively.