Plane
/pleɪn/noun
A flat, two-dimensional surface that extends infinitely in all directions.
Did you know?In ancient geometry, the word 'plane' was associated with the divine order of the universe, reflecting celestial harmony and the balance of the cosmos.
Etymological Timeline
Proto-Indo-European
PIE
*plā
“to spread out or extend”
Latin
Latin
planus
“flat, level, even”
Old French
Old French
plane
“flat surface, level ground”
Middle English
Middle English
plane
“a flat or level surface”
Modern English
English
plane
“a flat, two-dimensional geometric surface”