Definition of ordain

• v. t. - To set in order; to arrange according to rule; to regulate; to set; to establish.
• v. t. - To regulate, or establish, by appointment, decree, or law; to constitute; to decree; to appoint; to institute.
• v. t. - To set apart for an office; to appoint.
• v. t. - To invest with ministerial or sacerdotal functions; to introduce into the office of the Christian ministry, by the laying on of hands, or other forms; to set apart by the ceremony of ordination.