What Does Antialiasing Mean?
Antialiasing is a technique used in digital imaging to reduce the visual defects that occur when high-resolution images are presented in a lower resolution. Aliasing manifests itself as jagged or stair-stepped lines (otherwise known as jaggies) on edges and objects that should otherwise be smooth.
Techopedia Explains Antialiasing
Jaggies appear when an output device does not have a high enough resolution to represent a smooth line correctly. This is also an inherent problem on a computer monitor. The pixels that make up the screen of the monitor are all shaped in rectangles or squares. Because lighting up only half of one of these square pixels is not possible, the result is a jagged line.
