Planar

//ˈpleɪnɚ// adj

adj ·Uncommon ·Advanced level

Definitions

Adjective
  1. 1
    Of or pertaining to a plane.

    "A planar projection of a three-dimensional object is its projection onto a plane."

  2. 2
    Flat, two-dimensional.
  3. 3
    Able to be embedded in the plane with no edges intersecting.

    "A complete graph with more than four nodes is never planar."

  4. 4
    Having a flat profile, not etched into a mesa.
Adjective
  1. 1
    involving or having two dimensions wordnet

Synonyms

All synonyms
coplanarflatflattenedplateliketabulartwo dimensional

Example

More examples

"A planar projection of a three-dimensional object is its projection onto a plane."

Etymology

From Late Latin plānārius (“relating to a plane”), derived from Latin plānus (“flat”, “level”), equivalent to plane + -ar, ultimately from Proto-Indo-European *pleh₂- (“flat”).

Related phrases

planar defectplanar graphplanar inductiontwo dimensional

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.