The term 2-D Measurement refers to the measurement of two-dimensional objects or surfaces. It is a type of measurement that is used to calculate the AREA, perimeter, and other properties of two-dimensional shapes. The crossword solution for this term is AREA, which is a four-letter word. AREA is a measure of the size of a two-dimensional object or surface, and is calculated by multiplying the length and width of the object or surface.