plateau

noun5

1. •
   A largely level expanse of land at a high elevation; tableland.
2. •
   A comparatively stable level after a period of increase. (of a varying quantity)

   • Childhood obesity, rising for more than two decades, appears to have hit a plateau, a potentially significant milestone in the battle against excessive weight gain among children. — 2008
3. •
   A notable level of attainment or achievement.
4. •
   Any of several distinct, dose-dependent stages of a dextromethorphan trip.
5. •
   (old-fashioned) An ornamental dish for the table; a tray or salver.

verb1

1. •
   To reach a stable level after a period of increase; to level off.

   • Mr. [Jensen] Huang is nevertheless correct. Adoption has plateaued. — 2026

noun1

1. •
   A state of Nigeria in the North Central geopolitical zone. Capital and largest city: Jos.