High-definition (HD) refers to a resolution that provides a clearer and more detailed image than standard definition (SD). HD typically includes resolutions such as 720p (1280x720 pixels) and 1080p (1920x1080 pixels). This higher pixel count allows for sharper visuals, making it ideal for viewing on larger screens, such as televisions and computer monitors. The term "high-definition" is commonly used in the context of television broadcasts, streaming services, and video games. With the advancement of technology, many devices now support HD content, enhancing the overall viewing experience. Additionally, newer formats like 4K and 8K offer even higher resolutions, further improving image quality.