Upper-Intermediate (B2)
IPA: /pləˈnɛrɪti/
KK: /plænˈɛrɪti/
Definition
The state or quality of being flat or two-dimensional.
Example
The planarity of the surface is essential for the construction of the building.
Conversation

Have you ever thought about the concept of planarity in geometry?

Yeah, it’s interesting how it determines the shape of objects.

Exactly! I find it fascinating how everything has to fit into a flat space.

Right? It makes you appreciate the structure of things around us.
Synonyms & Antonyms
Synonyms
flatness
levelness
smoothness
Antonyms
curvature
unevenness
irregularity
Root Explanation
Planarity → It is formed from "planus" (meaning flat or level) and the suffix "-ity" (meaning the state or condition of). The word "planarity" refers to the state of being flat or two-dimensional.
Memory Tip
Think of 'flatness' ('planus') to remember that 'planarity' means the condition of being flat or level.
Visually Confused Words
coplanarity
polarity
plenarty
parity
panary