Overlying is a term used to describe something that is situated on top of something else. It is often used in the context of geology, where it can refer to a layer of rock or sediment that is situated above another layer. In other contexts, it can refer to something that is situated on top of something else, such as a roof overlying a house. The term is also used in mathematics, where it can refer to a number or quantity that is greater than another. The crossword solution for the term OVERLYING is ATOP, which is a four-letter word meaning 'on top of.'