According to the Catholic Church, a Church Council is ecumenical ("world-wide") if it is "a solemn congregation of the Catholic bishops of the world at the invitation of the Pope to decide on matters of the Church with him". The wider term "ecumenical council" relates to Church councils recognised by both Eastern and Western Christianity.
In Catholicism, in addition to ecumenical Councils, there are "particular Councils". Current Canon Law recognises two kinds of particular Councils: plenary councils involve the bishops of an episcopal conference (usually a single country), while provincial councils involve the bishops of an ecclesiastical province.