During a period of less use or demand than the maximum (peak), generally overnight.

A descending V-shaped point in the hairline in the middle of the forehead.

The peak of the Earth's oil production.

A large area and national park in northern England.

Rush hour. / (attributive, often hyphenated) Relating to peak periods in traffic and transportation.

In the tourist industry, the period of highest demand.

The largest measure of air respired from the lungs. / The largest volume of water discharged from a stream or river.

(physics) A maximum in the graph of energy loss of a high-energy particle, as it travels through matter, just before it comes to rest.

plural of Bragg peak

plural of peak season