There are 2 definitions of peak in English:

peak1

Syllabification: peak
Pronunciation: /pēk
 
/

noun

  • 1The pointed top of a mountain: the snowy peaks rose against the blue of a cloudless sky
    More example sentences
    • It winds up through rolling hills with stands of poplar trees, distant views of lakes and snowy mountain peaks strung along the horizon.
    • The visitor is mesmerized by its sunny beaches, snowy mountain peaks, endless plains where black bulls graze, shimmering lakes and mountain streams.
    • How it ended up on the peak of a snowy mountain (located over a crocodile lake and through a blue tunnel) is a question we'll have to save for another day.
    Synonyms
  • 1.1A mountain, especially one with a pointed top: the rocky outcrops of peaks such as the Cassongrat offer a challenge to rock climbers
    More example sentences
    • The highest peak is Mount Apo in Mindanao at 9,689 feet.
    • The over 100 volcanic peaks in the range, some over 3,000 metres in elevation, include more than a dozen which are considered active.
    • Where the White Mountains come to an end is the great peak of Mount Mindolluin.
    Synonyms
  • 1.2A projecting pointed part or shape: whisk 2 egg whites to stiff peaks
    More example sentences
    • Trim to a triangular shape, leaving the peak as high as possible.
    • Every tree seems to me to be shaped as a peak uniquely designed for the very spot it stands in.
    • The shapes of the peaks are broader and less asymmetric.
  • 1.3A point in a curve or on a graph, or a value of a physical quantity, higher than those around it: a slight increase in velocity provides a second peak on the general velocity curve
    More example sentences
    • What happens in all these cases is that a small number of CDs or whatever sell in enormous quantities, forming a peak on the graph.
    • The inset shows the second differential curves calculated from peaks 7 and 8 of the quinone spectra.
    • As expected, loop regions show more motion than helical regions, which is reflected in the larger deviations from the starting point as indicated by peaks in the graph.
  • 1.4The point of highest activity, quality, or achievement: anyone who saw Jones at his peak looked upon genius
    More example sentences
    • But as time passed, he no longer was at his peak, and the quality of his troops declined, while his enemies had learned their lessons.
    • At their peak, cassette sales alone brought in an estimated $50 million annually.
    • At his peak he was almost unstoppable and only the quality of competition limited his Scotland appearances to two.
    Synonyms
    height, high point/spot, pinnacle, summit, top, climax, culmination, apex, zenith, crowning point, acme, capstone, apogee, prime, heyday
  • 1.5chiefly British A stiff brim at the front of a cap.
    More example sentences
    • Kitted out in his team-issue polo shirt, the peak of his baseball cap shading his outdoor complexion, short sleeves revealing the power in his forearms still.
    • A ponytail of strawberry blond hair hung casually below the reversed peak of her baseball cap.
    • In addition there was a fellow in a brown bowler hat, another in a shapeless cloth cap with a peak, and both added their encouragements, turning to Waistcoat in a laconic collusion.
    Synonyms
  • 1.6The narrow part of a ship’s hold at the bow or stern.
    More example sentences
    • It looked like an ornament, like something at the front peak of a ship, a statue of some sort.
  • 1.7The upper, outer corner of a sail extended by a gaff.

verb

[no object] Back to top  
  • Reach a highest point, either of a specified value or at a specified time: its popularity peaked in the 1940s the rate of increase peaked at 34 percent last autumn
    More example sentences
    • In 1980, the suicide rate in Denmark peaked and reached a level that was among the highest in the world, with 34 suicides per 100 000 inhabitants.
    • Values for vineyards peaked in 2000 in the range of $85,000 to $180,000 per acre, but sales activity in 2003 was virtually nil.
    • Farther out, some see rates peaking at 5.25 per cent in the first half of 2005.
    Synonyms
    reach its height, climax, reach a climax, come to a head

adjective

[attributive] Back to top  
  • 1Greatest; maximum: he did not expect to be anywhere near peak fitness until Christmas
    More example sentences
    • Actually, yes, it is possible to hold a high, but not peak, level of fitness for a long time.
    • PC manufacturers developed state-of-the-art thermal solutions to ensure that notebooks run at the peak performance level under normal conditions.
    • The text is addressed to all performers, athletes, business people, trial lawyers and anyone else who needs guidance on how to work at their peak performance level.
    Synonyms
  • 1.1Characterized by maximum activity or demand: at peak hours, traffic speeds are reduced considerably
    More example sentences
    • The facility's energy strategies will result in a 67 percent reduction in electric energy use during peak demand hours.
    • People will use their cars less as a result, reducing air pollution, decreasing traffic congestion and lessening peak period demands on public transport.
    • The plan also calls on employers to consider introducing flexi-times, so that the effect of the peak demand by traffic on the road network can be diluted.

Derivatives

peakiness

noun

Origin

mid 16th century: probably a back-formation from peaked, variant of dialect picked 'pointed'.

Usage

See peek (usage)

More definitions of peak

Definition of peak in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day kerf
Pronunciation: kərf
noun
a slit made by cutting with a saw

There are 2 definitions of peak in English:

peak2

Syllabification: peak
Pronunciation: /
 
pēk/

verb

[no object] archaic
  • Decline in health and spirits; waste away.

Origin

early 17th century: of unknown origin. The phrase peak and pine derives its currency from Shakespeare.

More definitions of peak

Definition of peak in: