transeptPronunciation: /ˈtransɛpt, ˈtrɑːn-/Translate transept | into Italian Definition of transept noun (in a cross-shaped church) either of the two parts forming the arms of the cross shape, projecting at right angles from the nave:the north transeptDerivatives transeptalPronunciation: /-ˈsɛpt(ə)l/ adjective Origin: mid 16th century: from modern Latin transeptum (see trans-, septum)transept in other Oxford dictionaries Definition of transept in the US English dictionary