mask
mask
(mask') n.
1. Text editing. A control line that marks off specific character positions in every line in a file, protecting them from changes during the editing process.
2. Graphics. a shape that limits the area of a graphic or image that is used, displayed, or processed.
v.t.
3. to hide or exclude from processing by the use of a mask.
4. Macro language. to use macro quoting to remove the special significance of (a special character or operator).
MASK (SAS word)
Line command.