The navev/ is the central aisle of a basilicachurch, or the main body of a church (whether aisled or not) between its rear wall and the far end of its intersection with the transept at the chancel. It is the zone of a church accessible by the laity.
The nave extends from the entry—which may have a separate vestibule (the narthex)—to the chancel and may be flanked by lower side-aisles separated from the nave by an arcade. If the aisles are high and of a width comparable to the central nave, the structure is sometimes said to have three naves. It provides the central approach to the high altar.