U+25AF "▯" White Vertical Rectangle Unicode Character

U+25AF "▯" White Vertical Rectangle is a graphical symbol that represents an empty or unfilled rectangular shape oriented vertically, commonly used in typography, user interface design, and text-based diagrams to denote an open area, a placeholder, or a missing element. It belongs to the Geometric Shapes Unicode block and is often employed in character-based graphics or as a visual marker in checklists, forms, or technical documentation where a simple vertical outline is needed. Unlike filled or horizontal counterparts, this character provides a clean, hollow frame that can be combined with other symbols for layout purposes or to indicate an unselected state in digital interfaces.