Category:Triforium

Tri*fo"ri*um, n. Etym: [ll., fr. L. tri- (see tri-) + foris, pl. Fores, a door.] (arch.)

Defn: the gallery or open space between the vaulting and the roof of The aisles of a church, often forming a rich arcade in the interior Of the church, above the nave arches and below the clearstory Windows.