It sold well at first, but recently sales have plateaued.
It's pleasant to take a walk on the plateau.
What is the altitude of the plateau?
The US death rate reached a plateau in the 1960s, before declining suddenly. I'd been losing about a pound a week on my diet, but recently I've plateaued and haven't lost an ounce.
Unfortunately, these efforts have reached a plateau and have slowed down.
Even then I do not plateau.
an area of fairly level high ground. "a windswept plateau" a state of little or no change following a period of activity or progress. "the peace process had reached a plateau"
cross the plateau
We travelled through a vast plateau.
At the end of the valley was a high plateau, lush and green from the recent rains.
She found herself on top of a plateau.
to reach a plateau in one's career
No matter how much you try, you don't lose even a kilo. You might even gain a little weight. This is the diet plateau.