English Reference
noun · verb · adjective

peak

n. · v. · adj.
US /ˈpik/ UK /pˈiːk/ peak

  1. 01 B1 Intermediate

    n.the pointed top of a mountain or hill.

    n.the summit or highest point of a mountain, hill, or range, typically terminating in a point.

    Simple

    The climbers finally reached the peak of the mountain just before the storm arrived.

    In context

    From the valley floor, the jagged peak remained hidden behind a thick veil of mist until the afternoon winds cleared the sky.

  2. 02 B2 Upper Intermediate

    n.the point when something is at its highest level or most successful.

    n.the point of highest intensity, value, or achievement within a specific period.

    Simple

    Traffic usually reaches its peak around five o'clock in the afternoon.

    In context

    The athlete was at the peak of her career when she won three gold medals in a single season.

  3. 03 B2 Upper Intermediate British English

    n.the front part of a hat that shades your eyes from the sun.

    n.the stiff, projecting front part of a cap; often referred to as a visor in American English.

    Simple

    He pulled the peak of his cap down to hide his face from the cameras.

    In context

    The officer adjusted the peak of his service cap, ensuring it sat perfectly level before the inspection began.

  4. 04 C1 Advanced SlangInformal

    n.something that is of the highest possible quality or the best example of its kind.

    n.a state of exceptional quality or the quintessential representation of a genre or type.

    Simple

    That new superhero movie is peak cinema.

    In context

    The internet erupted in memes, claiming the season finale was peak television for its unexpected plot twists.

    Teacher's tip

    This usage is very common in internet culture to describe media or moments that are perfect or archetypal.

  5. 05 B2 Upper Intermediate

    v.to reach the highest point or level.

    v.to reach a maximum level of intensity, volume, or activity. Often used as an intransitive verb.

    Simple

    The fever usually peaks in the middle of the night.

    In context

    Economists predict that inflation will peak in the second quarter before gradually declining toward the end of the year.

  6. 06 B2 Upper Intermediate

    adj.used to describe the time when something is at its highest level or most busy.

    adj.relating to the period of maximum demand or greatest intensity.

    Simple

    Electricity costs more during peak hours when everyone is using it.

    In context

    The hotel increases its rates significantly during the peak tourist season to capitalise on the high demand.

    off peak
  7. 07 C2 Proficiency SlangBritish EnglishDialect

    adj.used to describe a situation that is very bad, unfair, or unlucky.

    adj.denoting a situation that is unfortunate, disappointing, or particularly difficult.

    Simple

    It is so peak that your car broke down on the way to the interview.

    In context

    Missing the last train home when it is raining is absolutely peak.

    Teacher's tip

    This is specifically Multicultural London English (MLE). In this dialect, 'peak' can mean 'very bad', which is the opposite of its standard 'top quality' slang meaning.

Romania has declared a state of energy emergency throughout August and asked companies and households to reduce consumption during peak hours.

The Guardian· 14 Aug 2026

The stock quadrupled in value before most of those gains were wiped out, leaving his investment, now worth about 300 million won, at roughly half the value of its peak.

BBC News· 13 Aug 2026

Etymology 1

From earlier peake, peek, peke, from Middle English pek (in place names), itself an alteration of pike, pyke, pyk (“a sharp point, pike”), from Old English pīc, piic (“a pike, needle, pin, peak, pinnacle”), from Proto-West Germanic pīk, from Proto-Germanic pīkaz (“peak”). Cognate with Dutch piek (“pike, point, summit, peak”), Danish pik (“pike, peak”), Swedish pik (“pike, lance, point, peak”), Norwegian pik (“peak, summit”). More at pike.

Etymology 2

Unknown. Perhaps related to Etymology 1 above in the sense of "becoming pointed" through emaciation.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin gem-pro *pīkaz
Level C1 · Advanced
Frequency Common
Updated