1 : act as the navigator in a car, plane, or vessel and plan, direct, plot the path and position of the conveyance
2 : put an address on (an envelope)
3 : operate an airplane
4 : be a guiding or motivating force or drive
5 : handle and cause to function
6 : give instructions or directions for some task
7 : give directions to; point somebody into a certain direction
8 : travel in front of; go in advance of others
9 : be a tutor to someone; give individual instruction