plane.
Of a surface: flat or level.
Meaning & usage
Of a surface: flat or level.
Where this word comes from
Etymology tree Proto-Indo-European *pleth₂-? Proto-Indo-European *pel-? Proto-Indo-European *pleh₂- Proto-Indo-European *-nós Proto-Indo-European *pl̥h₂nós Proto-Italic *plānos Latin plānus Latin plānumder. English plane 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.
A level or flat surface.
A flat surface extending infinitely in all directions (e.g. horizontal or vertical plane); a bounded portion thereof.
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.
A level of existence or development.
astral plane
A roughly flat, thin, often moveable structure used to create lateral force by the flow of air or water over its surface, found on aircraft, submarines, etc.
Any of 17 designated ranges of 2¹⁶ (65,536) sequential code points each.
Where this word comes from
Etymology tree Proto-Indo-European *pleth₂-? Proto-Indo-European *pel-? Proto-Indo-European *pleh₂- Proto-Indo-European *-nós Proto-Indo-European *pl̥h₂nós Proto-Italic *plānos Latin plānus Latin plānumder. English plane 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.
A tool for smoothing wood by removing thin layers from the surface.
Where this word comes from
From Middle English plane, plaine, from Anglo-Norman plaine, from Late Latin plāna (“planing tool”).
To smooth (wood) with a plane.
Where this word comes from
From Middle English plane, plaine, from Anglo-Norman plaine, from Late Latin plāna (“planing tool”).
An airplane; an aeroplane.
on a plane
Any of various nymphalid butterflies, of various genera, having a slow gliding flight.
The butterfly Bindahara phocides, family Lycaenidae, of Asia and Australasia.
Where this word comes from
Etymology tree Proto-Indo-European *h₂ews- Proto-Indo-European *-r Proto-Indo-European *h₂ewsér Proto-Hellenic *auhḗr Ancient Greek ᾱ̓ήρ (āḗr) Ancient Greek πλανάω (planáō) Ancient Greek -ος (-os) Ancient Greek ᾱ̓ερόπλᾰνος (āeróplănos)der. French aéroplanebor. English aeroplaneclip. English plane Clipping of aeroplane.
To move in a way that lifts the bow out of the water.
To glide or soar.
Where this word comes from
Etymology tree Proto-Indo-European *h₂ews- Proto-Indo-European *-r Proto-Indo-European *h₂ewsér Proto-Hellenic *auhḗr Ancient Greek ᾱ̓ήρ (āḗr) Ancient Greek πλανάω (planáō) Ancient Greek -ος (-os) Ancient Greek ᾱ̓ερόπλᾰνος (āeróplănos)der. French aéroplanebor. English aeroplaneclip. English plane Clipping of aeroplane.
A deciduous tree of the genus Platanus.
A sycamore.
Where this word comes from
From Middle English plane, borrowed from Old French plane, from Latin platanus, from Ancient Greek πλάτανος (plátanos), from πλατύς (platús, “wide, broad”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.