(ˈpəʊstˌbɔɪ) n1. a man or boy who brings the post round to offices2. (Horse Training, Riding & Manège) another name for postilion
pos•til•ion
(poʊˈstɪl yən, pɒ-)
n. a person who rides the left horse of the leading or only pair of horses drawing a carriage. Also, esp. Brit.,pos•til′lion.[1580–90; earlier postillon < Middle French < Italian postiglione] EncyclopediaSeepostilion