(1):
(v. t.) To give notice to, of approaching or probable danger or evil; to caution against anything that may prove injurious.
(2):
(v. t.) To make ware or aware; to give previous information to; to give notice to; to notify; to admonish; hence, to notify or summon by authority; as, to warn a town meeting; to warn a tenant to quit a house.
(3):
(v. t.) To ward off.
(4):
(v. t.) To refuse.