raster — English Dictionary

Noun

1. A scanning pattern of parallel lines that form the display of an image projected on a cathode-ray tube of a television set or display screen.

2. A bitmap image, consisting of a grid of pixels, stored as a sequence of lines.

   Synonyms

   bitmappixmap

Verb

1. To scan in parallel lines.

Noun

1. the rectangular formation of parallel scanning lines that guide the electron beam on a television screen or a computer monitor

   Broader terms

   formation