round bracket; In a language, a parenthesis inserted to add an annotation or supplementary content, to display the spelling for both Korean and a foreign language simultaneously, to imply that something can be omitted, to specify the action, mood, or state of something in a piece of writing with conversations such as a play, etc., to show that a content has been inserted, or to imply that the number or letter refers to the order or type of a category, etc.; round bracket; In math, the name of the sign'( )' showing that a certain expression will be calculated first.