facade

1. (architecture) The face of a building, especially the front view or elevation.Examples: "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."; "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."; "The house of Ruthven was a small but ultra-modern limestone affair, between Madison and Fifth ;[…]. As a matter of fact its narrow ornate façade presented not a single quiet space that the eyes might rest on after a tiring attempt to follow and codify the arabesques, foliations, and intricate vermiculations of what some disrespectfully dubbed as “near-aissance.”"Synonyms: face, front, frontage

2. (by extension) The face or front (most visible side) of any other thing, such as the prospect of an organ.broadly

3. (figuratively) A deceptive or insincere outward appearance.Synonyms: appearance, cover, front, guise, pretencefiguratively

4. (programming) An object serving as a simplified interface to a larger body of code, as in the facade pattern.Examples: "Facades are widely used for tasks like simplifying complex APIs."