▪ I. plateau plat‧eau 1 [ˈplætəʊ ǁ plæˈtoʊ] verb [intransitive]
if something plateaus, it reaches and then stays at a particular level:
• The athletic footwear market has not yet plateaued.
[m0] ▪ II. plateau plateau 2 noun [countable usually singular]
a period during which the level of something does not change, especially after it has been increasing:
• The rate of inflation has reached a plateau.
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Ⅰ.
plateau UK US /ˈplætəʊ/ US /plæˈtəʊ/ noun [S]
► a level beyond which business activities, sales, profits, etc. no longer develop or increase, especially after a period of rapid growth: reach/hit a plateau »
Do you believe that the number of people using the internet has now reached a plateau?
Ⅱ.
plateau UK US /ˈplætəʊ/ US /plæˈtəʊ/ verb [I]
► to stop developing or increasing, especially after a period of rapid growth: »
Analysts believe the market will plateau within the next five years in line with demographic trends.
start/begin to plateau »Sales of new cars have begun to plateau after three years of record growth.
Financial and business terms. 2012.