This glossary is a list of definitions of various terms for WordPressWordPress WordPress (WordPress.org) is a content management system (CMS) based on PHP and MySQL that is usually used with the MySQL or MariaDB database servers but can also use the SQLite database engine.. It helps for end users who aware of WordPress terms such as Post, Post MetaPost Meta Meta has several meanings, but generally means information about. In WordPress, meta usually refers to administrative type information., Admin Bar etc.