Definition of transept noun from the Oxford Advanced Learner's Dictionary

 

transept

 noun
noun
BrE BrE//ˈtrænsept//
 
; NAmE NAmE//ˈtrænsept//
 
(architecture) Religious buildings
 
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either of the two wide parts of a church shaped like a cross, that are built at right angles to the main central part the north/south transept of the cathedral compare nave See related entries: Religious buildings Word Origin mid 16th cent.: from modern Latin transeptum (see trans-, septum).
See the Oxford Advanced American Dictionary entry: transept