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peak

adjective [before noun]
 
 
/piːk/

Definition

peak times are the times when most people are using or doing something: Traffic congestion is really bad at peak periods (= when it is most busy). It is most expensive to advertise at peak viewing times (= those with the most people watching). Don't go there in the peak (= busiest) season - it'll be hot and crowded.Busy and activeHurrying and doing things quickly peak levels or rates are when they are at their highest: peak rate electricityMaximum and minimum
(Definition of peak adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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