Surface measure is a term used to describe the measurement of an AREA. It is typically used in mathematics, engineering, and surveying to calculate the size of a two-dimensional space. The crossword solution for this term is AREA, which is a four-letter word. Surface measure is a way to measure the size of a surface, such as a room or a field, by calculating the length and width of the space. This type of measurement is important for many applications, such as construction, mapping, and land surveying.