Its noun counterpart, which refers to various pointed or projecting parts, is more common: something that peaks reaches a peak. Just as every mountain has a peak, thinking of the peak—the highest …

From the lowlands of the south to the rugged peaks in the north, Derbyshire has something for everyone. Snow-covered peaks form a back-drop to beautiful mountain lakes.

Etymology: 16th Century: perhaps from pike2, influenced by beak1; compare Spanish pico, French pic, Middle Low German pēk ˈpeaky, ˈpeakish adj 'peaks' also found in these entries (note: many are not …

Electricity usage peaks during the summer. The singer's popularity peaked years ago. [=he is not as popular now] The stock price peaked several months ago at 30 dollars per share.

1. To be formed into a peak or peaks: Beat the egg whites until they peak. 2. To achieve a maximum of development, value, or intensity: Sales tend to peak just before the holidays.