正式

正式 means 'formal' in English, describing something that follows official rules, procedures, or standards. It is often used to contrast with informal or casual situations.

The character 正 (zhèng) originally meant 'correct' or 'proper,' while 式 (shì) refers to a form, style, or pattern. Together, they suggest something that adheres to an established standard or format.

正式 is commonly used in professional, legal, and social contexts to describe events, documents, or behavior that are officially recognized or structured. For example, a formal meeting, a formal invitation, or a formal agreement.