1peak 
/ˈpi:k/ noun
plural peaks /ˈpi:k/ noun [count] 1 a : the pointed top of a mountain
▪ a line of rocky peaks
b : a tall mountain with a pointed or narrow top
▪ Pikes Peak in Colorado — see color picture
c : something that looks like a pointed top of a mountain
▪ the peak of the roof ▪ The recipe says to beat the cream until it forms soft/stiff peaks. 2 : the highest level or degree of excellence, quantity, activity, etc.
▪ His cooking is the peak of perfection. [=is excellent] ▪ a singer at the peak [=height] of her popularity ▪ The team was at its peak [=played best] in the 1980s. ▪ At her peak she was writing a new novel every year. ▪ Violence reached a peak just before the election. ▪ The graph shows that murders in the city declined from a peak of 173 in 2004. ▪ There are peaks and valleys [=very high and very low levels] in electricity usage during the summer. 3 chiefly Brit : the front part of a cap or hat that shades the eyes : visor
▪ a line of rocky peaks
b : a tall mountain with a pointed or narrow top
▪ Pikes Peak in Colorado — see color picture
c : something that looks like a pointed top of a mountain
▪ the peak of the roof ▪ The recipe says to beat the cream until it forms soft/stiff peaks.
▪ His cooking is the peak of perfection. [=is excellent] ▪ a singer at the peak [=height] of her popularity ▪ The team was at its peak [=played best] in the 1980s. ▪ At her peak she was writing a new novel every year. ▪ Violence reached a peak just before the election. ▪ The graph shows that murders in the city declined from a peak of 173 in 2004. ▪ There are peaks and valleys [=very high and very low levels] in electricity usage during the summer.
