(noun, verb)


1. the most extreme possible amount or value

- voltage peak

Similar word(s): extremum

Definition categories: quantity, limit, limitation

2. the period of greatest prosperity or productivity

Similar word(s): bloom, blossom, efflorescence, flower, flush, heyday, prime

Definition categories: time, period

3. the highest level or degree attainable; the highest stage of development

- the peak of perfection

- summer was at its peak

Similar word(s): acme, elevation, height, meridian, pinnacle, summit, superlative, tiptop, top

Definition categories: state, degree, level, point, stage

4. the top or extreme point of something (usually a mountain or hill)

- the view from the peak was magnificent

Similar word(s): crest, crown, summit, tip, top

Definition categories: location, place, spot

5. a V shape

Similar word(s): point, tip

Definition categories: shape, convexity

6. the highest point (of something)

- at the peak of the pyramid

Similar word(s): acme, apex, vertex

Definition categories: location, extreme, extremum

7. a brim that projects to the front to shade the eyes

Similar word(s): bill, eyeshade, visor, vizor

Definition categories: man–made, brim

Sentences with peak as a noun:

- The stock market reached a peak in September 1929.


1. to reach the highest point; attain maximum intensity, activity

- That wild, speculative spirit peaked in 1929

Definition categories: motion, attain, gain, hit, make, reach

Sentences with peak as a verb:

- Historians argue about when the Roman Empire began to peak and ultimately decay.