peak

1 peak /ˈpiːk/ noun
plural peaks
1 peak
/ˈpiːk/
noun
plural peaks
Britannica Dictionary definition of PEAK
[count]
1 
a  : the pointed top of a mountain
b  : a tall mountain with a pointed or narrow top — see color picture on this page
c  : something that looks like a pointed top of a mountain
2 
: the highest level or degree of excellence, quantity, activity, etc.
3 
chiefly British : the front part of a cap or hat that shades the eyes : visor
2 peak /ˈpiːk/ adjective
2 peak
/ˈpiːk/
adjective
Britannica Dictionary definition of PEAK
always used before a noun
1 
: at the highest point or level
2 
: filled with the most activity
— opposite off-peak
3 peak /ˈpiːk/ verb
peaks; peaked; peaking
3 peak
/ˈpiːk/
verb
peaks; peaked; peaking
Britannica Dictionary definition of PEAK
[no object]
: to reach the highest level