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Added 7 October 2026

plane

/pleɪn/ adjective

In Latin: planum Wiktionary

adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about plane at Wordnik → Where our words come from →

Of a surface: flat or level.

noun

A level or flat surface.
A flat surface extending infinitely in all directions (e.g. horizontal or vertical plane); a bounded portion thereof. An imaginary plane which divides the body into two portions.
An imaginary plane which divides the body into two portions.

noun

A tool for smoothing wood by removing thin layers from the surface.

verb

To smooth (wood) with a plane.

Origin

From Latin plānum (“flat surface”), a noun use of the neuter of plānus (“plain”). The word was introduced in the 17th century to distinguish the geometrical senses from the other senses of plain. Doublet of llano, piano, plain, and plan.

From Wiktionary, via Kaikki.org (CC BY-SA)

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