Augustinian order - any of several monastic orders observing a rule derived from the writings of St. Augustine

Benedictine order, order of Saint Benedict - a Roman Catholic monastic order founded in the 6th century; noted for liturgical worship and for scholarly activities

Carmelite order, Order of Our Lady of Mount Carmel - a Roman Catholic mendicant order founded in the 12th century

Carthusian order - an austere contemplative Roman Catholic order founded by St. Bruno in 1084

Dominican order - a Roman Catholic order of mendicant preachers founded in the 13th century

Franciscan order - a Roman Catholic order founded by Saint Francis of Assisi in the 13th century

Jesuit order, Society of Jesus - a Roman Catholic order founded by Saint Ignatius of Loyola in 1534 to defend Catholicism against the Reformation and to do missionary work among the heathen

religious order, religious sect, sect - a subdivision of a larger religious group