Clerks Regular

Those bodies of men in the Church who by the very nature of their institute unite the perfection of the religious state to the priestly office, i.e. who while being essentially clerics, devoted to the exercise of the ministry in preaching, the administration of the sacraments, the education of youth, and other spiritual and corporal works of mercy, are at the same time religious in the strictest sense of the word, professing solemn vows, and living a community life according to a rule solemnly approved of by the sovereign pontiff.