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.

A large area and national park in northern England.

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

The peak of the Earth's oil production.

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.

(chromatography) a peak at an unexpected position (or time), due to e.g. contamination of the sample or from the previous analysis (if one of the substances had a retention time longer than the runtime)

Alternative form of hoddy-peak

(obsolete) A fool, person of low intelligence. / (obsolete) A cuckold, a married man whose wife is unfaithful.