- a pattern of horizontal scanning lines traced by an electron beam, esp on a television screen
WordReference Random House Unabridged Dictionary of American English © 2020
ras•ter (ras′tər),USA pronunciation n.
- Radio and Television[Television.]a pattern of scanning lines covering the area upon which the image is projected in the cathode-ray tube of a television set.
- Computinga set of horizontal lines composed of individual pixels, used to form an image on a CRT or other screen.
- Latin rāstrum toothed hoe, rake, derivative of rādere to scratch, scrape
Collins Concise English Dictionary © HarperCollins Publishers::
raster /ˈræstə/ n