Definition: The word "style.css" refers to a stylesheet in HTML, which is used to style CSS. In simple terms, it's like a set of rules or instructions for styling a webpage. A stylesheet is a way to organize CSS styles that apply to multiple elements on a webpage, such as different sections, blocks, and paragraphs. It makes the process of changing the appearance of these elements easier by providing a consistent set of styles that can be applied across them. In the case of style.css, it's used to define which classes are used in a specific element, how they're styled, and where they should appear on the page. This stylesheet helps ensure consistency in styling across different parts of the webpage, making it easier for developers to maintain their projects and improve their visual appeal. Understanding the definition of "style.css" is important because it highlights that style.css is more than just a set of CSS rules; it's a way to organize and manage CSS styles.