The number of horizontal lines on a TV or computer screen. The term typically refers to TV sets; for example, wide screen digital TVs have 720 or 1,080 lines of resolution, while analog TV uses 525 lines. VHS tapes can render from 240 to 260 lines.
Computers Are Rated in Both Dimensions
Screens on computer monitors and laptop computers are rated in both dimensions; for example, 1280x1024 or 1600x1200. Digital TV sets also have two dimensions; for example, 1920x1080 and 1280x720, but because there are fewer specifications than computer monitors, the number of lines of resolution (horizontal lines measured from top to bottom) are more commonly used. See NTSC, DTV, 720p, 1080i and resolution.
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