Antialiasing

Part of speech: noun

Pronunciation: /ˈæn.tiˈeɪ.li.əs.ɪŋ/

Definitions

1. A method used in digital graphics to smooth jagged edges by blending colors along boundaries
2. A process that minimizes the stair-step effect on curved or diagonal lines in computer-generated images
3. A technique that improves image appearance by softening hard edges and reducing pixelation artifacts

Etymology: Antialiasing is a technical coinage, built by attaching the prefix "anti-" to "aliasing." The prefix comes from Ancient Greek "anti," meaning "against" or "opposite," so the word literally names a method working against aliasing. Aliasing itself is the distortion that appears when a smooth diagonal line or curve is drawn on a pixel grid and its edges turn jagged, like stairsteps. The "alias" half traces back to Latin "alias," meaning "otherwise" or "at another time," with roots in the Proto-Italic "aljos," meaning "other." English took "alias" in the sense of an assumed name, the idea being a person known "otherwise." The "-ing" ending turns the noun into a process, so "aliasing" describes the jagged effect and "antialiasing" describes the countermeasure. The word is a plain compound of these parts, and its use in computer graphics is a modern development rather than an older English sense.