A "side window" refers to a window located on the side of a building, vehicle, or other structures. In homes, side windows can provide natural light and ventilation, enhancing the living space. In vehicles, they allow passengers to see outside and can be opened for fresh air. In architecture, side windows can vary in size and design, often complementing the overall aesthetic of the structure. In cars, side windows are typically made of tempered glass for safety and can be tinted for privacy. They play a crucial role in both functionality and design in various contexts, including homes and automobiles.