An Introduction to WordPress Themes A WordPress theme is a group of files (graphics, style sheets, and code) that dictates the overall appearance of your blog or website. Themes can control something as vast as your sites layout, or as minute as your hyperlink colors.

How do you define theme?

1a : a subject or topic of discourse or of artistic representation guilt and punishment is the theme of the story. b : a specific and distinctive quality, characteristic, or concern the campaign has lacked a theme. 2 : a melodic subject of a musical composition or movement.