peak Definition

peak¹
noun

1a. A sharp pointed summit;

Thesaurus: summit, tip, apex, crest.
1b. A pointed mountain or hill.
2a. A maximum, eg in consumer use;

Example: Consumption reaches its peak at around 7pm
Thesaurus: maximum, high point, apogee, pinnacle, top, zenith, culmination; Antonym: nadir.
2b. Referring or relating to the period of highest use or demand.

Example: electricity consumed at peak periods
Example: peak viewing time
3. A time of maximum achievement, etc

Example: His peak was in his early twenties.
4. The front projecting part of a cap.
5. A pointed beard.
6. naut.
The upper outer corner of a sail extended by a gaff or yard.

verb, intr peaked, peaking

1. To reach a maximum.

Thesaurus: climax, come to a head, culminate, top out.
2. To reach the height of one's powers or popularity.

Etymology: 16c: probably related to pike².

---

peak²
verb

intr
peaked, peaking
1. To droop; to look thin or sickly.

Etymology: 16c.