The term "narrow" refers to something that has a small width or limited extent from side to side. It can describe physical objects, such as a narrow road or a thin book, indicating that they are not wide. In a broader sense, "narrow" can also apply to ideas or perspectives that are limited in scope, suggesting a lack of diversity or openness. In contrast, "thin" typically describes an object that has a small thickness or is not dense. For example, a thin layer of paint or a thin slice of bread indicates that these items have minimal depth. Both terms can be used to convey a sense of restriction or limitation in various contexts.