What is the meaning of Plateau?

A largely level expanse of land at a high elevation; tableland.

A comparatively stable level after a period of increase.

An ornamental dish for the table; a tray or salver.

A notable level of attainment or achievement.

Any of several distinct, dose-dependent stages of a dextromethorphan trip.

(of a varying quantity) To reach a stable level after a period of increase; to level off.

plateau (level expanse of land)

plateau (level expanse of land)

plateau (comparatively stable level)

plateau (tray)

flat area

tray

plateau

stage (in theatre); set (of television broadcast)

chainring

Source: wiktionary.org