noun /fəˈsɑːd/
a) The face of a building, especially the front view or elevation.
In Egypt the façades of their rock-cut tombs were ... ornamented so simply and unobtrusively as rather to belie than to announce their internal magnificence.
b) The face or front (most visible side) of any other thing, such as an organ.
Like so many of the finest churches, [the cathedral of Siena] was furnished with a plain substantial front wall, intended to serve as the backing and support of an ornamental façade.
Wikipedia foundation.