a season-ticket holder on a railway.
The holder of a commutation-ticket; gen., one who commutes (sense 4b). Also attributive.
(a) a person who jumps on to or from a (moving) train; (b) a person who boards a train illegally.
a person, esp. a hobo, who (habitually) travels on the railways without paying by riding on the connecting draw rod of a railway carriage or…