- of or relating to a geometric plane.
- flat or level.
Origin of planar
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- of or relating to a plane
- lying in one plane; flat
C19: from Late Latin plānāris on level ground, from Latin plānus flat
Word Origin and History for planarity
1850, from Latin planaris "level, flat," from planum "plane" (see plane (n.1)).
Online Etymology Dictionary, © 2010 Douglas Harper