noun
or clear·story ˈklir, -iə+ˌ-
( -es )
Etymology: Middle English, from clere clear + story
1. : an outside wall of a room or building (as a church) carried above an adjoining roof and pierced with windows which admit light to the interior
2. : interior space on the level of the clerestory in a room or building : gallery
3. : a raised section of a railroad car roof having windows or openings for ventilation on the sides
[s]cleresto.jpg[/s] [
clerestory 1
]