U+2A42 "⩂" Union with Overbar Unicode Character

U+2A42 "⩂" Union with Overbar is a mathematical symbol used in set theory and related fields to denote the union of two sets with an overline or bar drawn above it, typically indicating the complement of that union or a modified union operation involving closure or an additional constraint. This character belongs to the Supplemental Mathematical Operators block, which provides a range of specialized symbols for advanced notation in mathematics and logic. Its visual form combines the familiar cup-shaped union symbol (∪) with a horizontal overbar, distinguishing it from the standard union operator in formal written expressions.