In the same way that an “industrial area” is a place of industry where people work, a residential area is made up of houses and apartment buildings — places where people reside.
Residential is an adjective that expresses a relationship with homes, apartments, or any place where people live. You might refer to a residential building, a residential neighborhood, or a residential block. Something that is deemed “for residential use” is designed for use at home or rather than for business or commercial use.
