I. ˈprōˌstīl adjective
Etymology: Latin prostylos having pillars in front, from Greek, from pro- pro- (I) + stylos pillar — more at steer
: marked by columniation consisting of free columns in a front portico only and across the full front of the structure — compare amphiprostyle , pseudoprostyle ; see columniation illustration
II. noun
( -s )
: a prostyle building