After several years of rapid growth, the company is now at a 'plateau'. [=it has stopped growing]
Sales of computers have 'plateaued' in recent years.
The price of gas seems to have reached a 'plateau'.
(..) Yeah, yeah, can I help you? In so many ways. Working late tonight, aren't you? Yeah, I work better at night. And these soil samples just arrived from the Bindura plateau. Ah, Zimbabwe. Their crops have been overrun by disease for decades. Well... ...your work will put an end to that. (..)1998 TvShow: Charmed Title: The Truth Is Out There... and It Hurts Season: 1 Episode 8