Find Antonyms

planar Antonyms

Opposite of planar

Because the opposite of planar shifts with each meaning, the antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
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• adjective (Context 1)

Relating to, lying in, or having the form of a geometric plane; flat or two-dimensional.

Usage Example

"Benzene has a nonplanar molecular structure in which all twelve atoms lie in the same flat plane."

Strongest
nonplanar
three-dimensional
Strong
spatial
curved

• adjective (Context 2)

Can be embedded in a plane such that its edges intersect only at their endpoints (of a mathematical graph).

Usage Example

"According to Kuratowski's theorem, a finite graph is nonplanar if and only if it does not contain a subgraph that is a subdivision of K5 or K3,3."

Strongest
nonplanar

Similar words to planar

Words similar to planar shift depending on context. Common synonyms include:

flat
two-dimensional
planate
level
coplanar
See all synonyms of planar

• Nearby Words

plaintively
plait
plan
planar
plane
planetary
planetwide

Cite this Entry

Wordmom. (2026). Antonyms for Planar. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/planar
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