• synonyms


See more synonyms for planar on Thesaurus.com
  1. of or relating to a geometric plane.
  2. flat or level.
Show More

Origin of planar

1840–50; < Late Latin plānāris flat, of a level surface, equivalent to Latin plān(um) plane1 + -āris -ar1
Related formspla·nar·i·ty [pluh-nair-i-tee] /pləˈnɛər ɪ ti/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for planar


  1. of or relating to a plane
  2. lying in one plane; flat
Show More
Derived Formsplanarity (pleɪˈnærɪtɪ), noun

Word Origin

C19: from Late Latin plānāris on level ground, from Latin plānus flat
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for planar


1850, from Latin planaris "level, flat," from planum "plane" (see plane (n.1)).

Show More
Online Etymology Dictionary, © 2010 Douglas Harper