planar
Americanadjective
-
of or relating to a plane
-
lying in one plane; flat
Other Word Forms
Etymology
Origin of planar
1840–50; < Late Latin plānāris flat, of a level surface, equivalent to Latin plān ( um ) plane 1 + -āris -ar 1
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
OpenAI researchers’ proof—or really, disproof—of Erdős’s planar unit-distance problem is the kind of milestone that proponents of AI’s use in advanced mathematics have been waiting for.
From The Wall Street Journal • Jun. 2, 2026
To solve this problem, researchers at the Max Planck Institute in Mainz developed a planar electron tunneling spectroscopy method that can operate under these extreme pressures.
From Science Daily • Dec. 21, 2025
He had spent his life building a planar model of his ascent to the presidency, only to get whacked in the head by an unforeseen z-axis.
From Slate • Sep. 27, 2025
Previously, achieving π-stacking in similar norcorroles failed because hydrogen-bonding interactions between the side chains opposed the face-to-face stacking of the planar antiaromatic units.
From Science Daily • May 23, 2024
Assuming there are fifteen grains per linear inch, there are 15 x 15 per planar inch and 153 grains per cubic inch.
From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
