1.
[syn: postilion, postillion]
The Collaborative International Dictionary of English v.0.48:
Postilion \Pos*til"ion\, n. [F. postillon, It. postiglione, fr.
posta post. See Post a postman.]
One who rides and guides the first pair of horses of a coach
or post chaise; also, one who rides one of the horses when
one pair only is used. [Written also postillion.]
[1913 Webster]
WordNet (r) 3.0 (2006):
postilion
n 1: someone who rides the near horse of a pair in order to
guide the horses pulling a carriage (especially a carriage
without a coachman) [syn: postilion, postillion]