setback, in architecture, a steplike recession in the profile of a high-rise building. Usually dictated by building codes to allow sunlight to reach streets and lower floors, a setback is incorporated because the building must take another step back from the street for every specified added height interval.

What is the purpose of setback?

Simply put, the purpose of setbacks is to ensure one building does not infringe on another building's right to sunlight, ventilation, greenery and vehicular access.

What is an example of a setback?

The definition of a setback is an interruption in progress. An example of a setback is someone having a large, unexpected expense while in escrow on a house for which they have to find additional funds.