peak1
n.
- the pointed top of a mountain.
▸a mountain with a peak.
- the point of highest activity or achievement.
▸a point in a curve or on a graph, or a value of a physical quantity, which is higher than those around it.
- Brit. a stiff brim at the front of a cap.
- the upper, outer corner of a sail extended by a gaff.
v.
reach the highest point.
adj.
maximum or utmost:
at peak fitness.
▸characterized by maximum activity or demand:
peak hours.
Derivative
Etymology
C16: prob. a back-form. from peaked, var. of dial. picked ‘pointed’.
peak2
v.
archaic decline in health and spirits.
Etymology
C17: of unknown origin.