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English definition of “peak”

peak

verb [I]  /pik/ us  

peak verb [I] (REACH HIGHEST POINT)

to reach the highest point, value, or level: Official figures show unemployment peaked in November.
peak
adjective [not gradable]  /pik/ us  
During the peak season, the population swells with over 50,000 tourists.

peak

noun [C]  /pik/ us  

peak noun [C] (MOUNTAIN TOP)

the pointed top of a mountain, or the mountain itself
(Definition of peak from the Cambridge Academic Content Dictionary © Cambridge University Press)
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