a. [f. next + -AL.] Of, pertaining to, or constituting a triforium.
1848. B. Webb, Cont. Ecclesiol., 45. Each of these arches is situated below a blank triforial arcade of two arches.
1854. J. L. Petit, Archit. Stud. France, 37. The triforial arches of Amiens and Evreux.
1861. Beresf. Hope, Eng. Cathedr. 19th C., vi. 217. Previously to its reappearance in Germany, the triforial gallery had made good its position elsewhere.
