D defs.my
Entry 1 sense Webster, 1913

Postilion

· Pos·til·ion · IPA /pəˈstɪljən/
01 n. 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.
  1. 1.
    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.