(1):

(n.) A roving motion; course without definite direction; want of direction, rule, or method; hazard; chance; - commonly used in the phrase at random, that is, without a settled point of direction; at hazard.

(2):

(n.) Distance to which a missile is cast; range; reach; as, the random of a rifle ball.

(3):

(n.) The direction of a rake-vein.

(4):

(n.) Force; violence.

(5):

(a.) Going at random or by chance; done or made at hazard, or without settled direction, aim, or purpose; hazarded without previous calculation; left to chance; haphazard; as, a random guess.