The antonyms for the term "holding assembly" can vary depending on the context. However, some possible opposites that may apply are "disbanding," "dismantling," "splintering," "disassembling," or "breaking up." These words suggest the idea of dissolving, dispersing, or separating a group of people who previously gathered for a common purpose. They may apply to situations such as the end of a conference, the dissolution of a political party, the disbandment of a union, the break-up of a company, or the separation of a group of friends. Despite the negative connotation of these antonyms, the act of ending an assembly may also imply a positive outcome, such as achieving a goal or reaching a consensus.