The crossword solution for the term 'FOR ONE SQUARE' is SHAPE, which is a five-letter word. SHAPE is a broad term that can refer to any two-dimensional figure or form. It can also refer to the outline of an object, or the form of something as determined by its external boundaries. In mathematics, shapes are classified according to their properties, such as angles, sides, and area. Shapes can also be used to describe the physical characteristics of an object, such as its size, SHAPE, and color.