括号（( ) [ ] { } 【 】 〔 〕 < > bracket，又称括弧号、夹注号），为加在需注释的文本的左右（上下）两旁的双对符号，其有下列多种种类：

A bracket is a tall punctuation mark typically used in matched pairs within text, to set apart or interject other text. Used unqualified, brackets refer to different types of brackets in different parts of the world and in different contexts.

Brackets include round brackets/parentheses, square brackets, curly brackets, angle brackets, and various other pairs of symbols.