What feature identifies a lancet window as opposed to other window styles?

A lancet window is characterized by its tall and narrow form coupled with a pointed top, which distinguishes it from other window styles. This design is typically associated with Gothic architecture, where the elongated, tapering structure allows for a dramatic vertical line that draws the eye upwards, embodying the style’s emphasis on height and light. The pointed arch not only adds to the aesthetic appeal but also serves to channel rainwater away from the structure, enhancing durability. Other styles, such as round or flat-topped windows, display different proportions and shapes that do not convey the same vertical emphasis or architectural significance inherent in lancet windows.