What Does WordPress (WP) Mean?

WordPress is an open-source and free Web publishing application, content management system (CMS) and blogging tool built by a community of developers and contributors. WordPress allows users to build dynamic websites and blogs that may be updated, customized and managed from its back-end CMS and integrated application and components.

Techopedia Explains WordPress (WP)

In 2003, WordPress was created as a successor to b2/cafelog by Mike Little and Matt Mullenweg. It is provided as a hosted or self-hosted Web blogging platform.