(early Christian church) one of seven gatherings of bishops from around the known world under the presidency of the Pope to regulate matters of faith and morals and discipline WordNet 3.0 & Open English WordNet

An ecumenical council, also called general council, is a meeting of bishops and other church authorities to consider and rule on questions of Christian doctrine, administration, discipline, and other matters in which those entitled to vote are convoked from the whole world and which secures the approbation of the whole Church. Wikipedia

Conference of ecclesiastical dignitaries and theological experts convened to discuss and settle matters of Church doctrine and practice Wikidata