A screen is considered "high definition" (HD) if it has a resolution of at least 1280 x 720 pixels. This is the case here, the TV can display 1366 x 768 pixels natively. There are also higher HD resolutions, such as Full HD (1920 x 1080 pixels, often referred to as 1080p) and Ultra HD (3840 x 2160 pixels, also known as 4K).