v. 1 tr. manage or direct the course of (a ship, aircraft, etc.). 2 tr. a sail on (a sea, river, etc.). b travel or fly through (the air). 3 intr. (of a passenger in a vehicle) assist the driver by map-reading etc. 4 intr. sail a ship; sail in a ship. 5 tr. (often refl.) colloq. steer (oneself, a course, etc.) through a crowd etc.
[ L navigare f. navis ship + agere drive ]