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From The Collaborative International Dictionary of English v.0.48:
Navigation \Nav`i*ga"tion\, n. [L. navigatio: cf. F. navigation.] 1. The act of navigating; the act of passing on water in ships or other vessels; the state of being navigable. [1913 Webster] 2. (a) The science or art of conducting ships or vessels from one place to another, including, more especially, the method of determining a ship's position, course, distance passed over, etc., on the surface of the globe, by the principles of geometry and astronomy. (b) The management of sails, rudder, etc.; the mechanics of traveling by water; seamanship. [1913 Webster] 3. Ships in general. [Poetic] --Shak. [1913 Webster] Aerial navigation, the act or art of sailing or floating in the air, as by means of airplanes or ballons; aviation; aeronautic. Inland navigation, Internal navigation, navigation on rivers, inland lakes, etc. [1913 Webster]