Pilot- Someone who flies an airplane.
While this is alluded to in the entry made by Webster 1913, many of the mentioned "piloting" jobs listed within now have more technical titles, such as Captain, Helmsmen, etc. Pilot has become a more specific term for the person who operates and flys an airplane, rather then any other vessel.
Pilot- The test episode for a television program.
This episode is sent in to the studios to show an idea of how the show would look and feel before the studio invests any money in the idea.
While pilot episodes are rarely the first actual televised episode of a show, there has been a recent spree of shows putting their pilot episodes onto DVD collections.
Regarding pilot episodes, Star Trek is one of the only shows on record with 2 pilots!