Planar

Planar is an adjective meaning "relating to a plane (geometry)".

Planar may also refer to:

Science and technology

 * Planar (computer graphics), computer graphics pixel information from several bitplanes
 * Planar (transmission line technologies), transmission lines with flat conductors
 * Planar, the structure resulting from the planar process used in the manufacture of semiconductor devices, such as planar transistors
 * Planar graph, graph that can be drawn in the plane so that no edges cross
 * Planar mechanism, a system of parts whose motion is constrained to a two-dimensional plane
 * Planar Systems, an Oregon-headquartered manufacturer of digital displays
 * Zeiss Planar, photographic lens designed by Paul Rudolph at Carl Zeiss in 1896