Nave n. : The block in the center of a wheel, from which the spokes radiate, and through which the axle passes; -- called also hub or hob.

Nave n. : The navel.

Nave n. : The middle or body of a church, extending from the transepts to the principal entrances, or, if there are no transepts, from the choir to the principal entrance, but not including the aisles.

Example:
What is the name for the back of a Nave in a church?

Taxonomy
nave, vaulted nave, central nave, aisles, The crossing, transepts, bays, free encyclopedia, illustration, church, triforium, clerestory windows, passage, cathedral, choir, abbey church, sanctuary, Roman basilica.

Defination from the web:
nave of the abbey church of Saint-Georges-de-Boscherville, Normandy, France has a triforium passage above the aisle vaulting ... The nave of a church, whether Romanesque, Gothic or Classical, extends from the entry — which may have a separate vestibule, the narthex — to the ...