- the part of a cross-shaped church at right angles to the long, main section, or nave
- either arm of this part, outside the nave
Origin of transeptModern Latin transeptum ; from Classical Latin trans-, across + septum: see septum
- The transverse part of a cruciform church, crossing the nave at right angles.
- Either of the two lateral arms of such a part.
Origin of transeptNew Latin trānsēptum : Latin trāns-, trans- + Latin saeptum, partition; see septum.
- (architecture) The transversal part of a church, which crosses at right angles to the greatest length, and between the nave and choir. In the basilicas, this had often no projection at its two ends. In Gothic churches these project greatly, and should be called the arms of the transept. It is common, however, to speak of the arms themselves as the transepts.