Other forms: plateaus
A plateau is a high, wide stretch of flat land. The Tibetan plateau, cross the plateau, reach a plateau.
The figurative sense is now at least as common: to reach a plateau is to stop improving, which is what happens to almost any skill after the early gains. The plural can be plateaus or plateaux, and both are correct in English.
1nounplateauA high, wide stretch of flat land.
“The road climbed steeply before crossing a wide, windy plateau.”
plateau is a landform.
Also accepted in games: tableland
French plateau means a flat thing, a diminutive of plat, flat. Plate and platter are relatives.
Proto-Indo-European
*pleth₂-
French
plateau
English, today
plateau
Built from
French plateau, diminutive of plat (“a plate”); see plate. a doublet of platter.
Etymology from Wiktionary, CC BY-SA