What does the word quorum mean and what are quorum rules for congress?

The term "quorum" refers to the minimum number of members required to be present for a legislative body, such as Congress, to conduct its business legally. In the U.S. Congress, a quorum is defined as a simple majority of the members: 218 out of 435 in the House of Representatives and 51 out of 100 in the Senate. Quorum rules ensure that decisions are made with sufficient representation and participation from elected officials. If a quorum is not present, the body cannot take official action or vote on legislation.