(1):

(n.) A tower.

(2):

(v. t.) A turn; a revolution; as, the tours of the heavenly bodies.

(3):

(v. t.) anything done successively, or by regular order; a turn; as, a tour of duty.

(4):

(v. t.) A going round; a circuit; hence, a journey in a circuit; a prolonged circuitous journey; a comprehensive excursion; as, the tour of Europe; the tour of France or England.

(5):

(v. i.) To make a tourm; as, to tour throught a country.