To give lessons or repeated instructions to; drill, To do or perform something habitually or repeatedly, To carry out in action; observe, transitive verb_ To do or perform frequently, customarily, or habitually; to make a practice of, To exercise one's self in, for instruction or improvement, or to acquire discipline or dexterity, noun_ Application of science to the wants of men; the exercise of any profession; professional business, Frequently repeated or customary action; habitual performance; a succession of acts of a similar kind; usage; habit; custom, Frequent or customary performance; habit; usage; custom