A jet is an airplane that can rapidly travel long distances. To jet is the act of getting somewhere quickly, by jet or any other way, as in, "Do you see what time it is? We better jet!"
A jet is an aircraft that gets its power from jet engines rather than propellers. Jets are fast — that's probably why as a verb, jet means "to move quickly," either by taking a jet, like the celebrities who jet around the world, or the more ordinary "if I don't jet, I'll be late for school." Dishwashers and certain kinds of tubs have jets, tiny openings that push water out with great force. The streams of water are also called, you guessed it, jets.