U+25EF "◯" Large Circle Unicode Character

U+25EF "◯" Large Circle is a geometric symbol that represents a hollow, circular shape, distinct from the filled circle characters like the black circle (U+25CF). It is commonly used in digital typography, user interface design, and mathematical notation to denote empty sets, options, or boundaries. In contexts like checkboxes, it often signifies an unchecked state or an open selection. The symbol's clear, open form also makes it useful in diagrams, flowcharts, and as a placeholder in visual layouts.