1 of 5


: a pointed or projecting part of a garment
especially : the visor of a cap or hat
The cap's peak shades his eyes.
: promontory
a steep rocky peak
: a sharp or pointed end
the peak of a roof
: the top of a hill or mountain ending in a point
the fog hung … heavily on the peak of the hillH. D. Skidmore
: a prominent mountain usually having a well-defined summit
: something resembling a mountain peak
Beat the cream until it forms stiff peaks.
: the upper aftermost corner of a fore-and-aft sail
: the narrow part of a ship's bow or stern or the part of the hold in it
: the highest level or greatest degree
a singer at the peak of her popularity
: a high point in a course of development especially as represented on a graph
The graph shows that murders in the city reached a peak two years ago.


2 of 5

verb (1)

peaked; peaking; peaks

intransitive verb

: to reach a maximum (as of capacity, value, or activity)
often used with out

transitive verb

: to cause to come to a peak, point, or maximum


3 of 5


: being at or reaching the maximum
peak levels
peak output
peak performance
operating at peak strength/efficiency
Wang thinks that groundwater was jolted free by the quake. The water then trickled down into the streams and reached a peak outpour about 30 days later.Thomas Sumner
Air-conditioning is also one of the main contributors to peak electric power demand …Shane Cashman
also : of, relating to, or being a period of maximum intensity or activity
And because women, as a whole, leave later for work than men, they tend to travel right smack-dab in the peak hours of congestion (and even more so in the afternoon peak hours, which is partially why those tend to be worse.) Tom Vanderbilt
: being at the height of popularity, use, or attention
used before the name of a product, person, cultural trend, etc.
Just when you think we've surely reached peak bourbon, someone else ups the ante. No longer is it enough to have the oldest, the rarest, or the most expensive whiskey, or even to pick a personal barrel from a distillery.Dana McMahan
All this is to say, we are at peak Wes Anderson—or rather, we have been for a very, very long time. We have to ask: why is this style so easy to send up? And why is it so hard to dislodge?Louis Wise


4 of 5

verb (2)

peaked; peaking; peaks

intransitive verb

: to grow thin or sickly
: to dwindle away


5 of 5

verb (3)

peaked; peaking; peaks

transitive verb

nautical : to set (a gaff, a yard, etc.) nearer the perpendicular
rowing : to hold (oars) with blades well raised

Did you know?

Peek vs. Peak vs. Pique

Peek, peak, and pique: they sound the same but mean very different things.

The first one we learn is peek: it has to do with looking, especially furtively or quickly or through a small space, as in "open the box and peek inside." It's both a noun and a verb; when you peek, you take a peek. Our advice for remembering this one is to keep in mind that you peek in order to see.

Peak is the verb you use to talk about reaching a maximum, or coming to a highest point, literally or figuratively, as in "The meteor shower will last for several days but will peak on Sunday." Its noun counterpart, which refers to various pointed or projecting parts, is more common: something that peaks reaches a peak. Just as every mountain has a peak, thinking of the peak—the highest point—is the way to remember that peak is the choice for reaching the highest levels. Associating the "a" in peak with the "a" in maximum or with a capital "A" (the most mountain-like of letters) can be helpful.

Pique is the oddball of this trio. We know the "ique" spelling from the likes of technique, antique, and unique, but pique nonetheless looks a little exotic. It comes from a French word meaning literally "to prick," but its earliest English use was as a noun. The noun is still used: a pique is a transient feeling of wounded vanity—a kind of resentment. As a verb, pique was (and still is, especially in British English) used to mean "to arouse anger or resentment in," as in "Their rudeness piqued me." Now, however, it's most often our interest or curiosity that gets piqued—that is to say, our interest or curiosity is aroused, as in "The large key hanging next on the wall piqued my curiosity."

Pique has another meaning too, though it's less common than any of those already mentioned. Pique sometimes is used to mean "to take pride in (oneself)," as in "She piques herself on her editing skills."

Master this trio, and you can pique yourself on your word skills.

Choose the Right Synonym for peak

summit, peak, pinnacle, climax, apex, acme, culmination mean the highest point attained or attainable.

summit implies the topmost level attainable.

at the summit of the Victorian social scene

peak suggests the highest among other high points.

an artist working at the peak of her powers

pinnacle suggests a dizzying and often insecure height.

the pinnacle of worldly success

climax implies the highest point in an ascending series.

the war was the climax to a series of hostile actions

apex implies the point where all ascending lines converge.

the apex of Dutch culture

acme implies a level of quality representing the perfection of a thing.

a statue that was once deemed the acme of beauty

culmination suggests the outcome of a growth or development representing an attained objective.

the culmination of years of effort

Examples of peak in a Sentence

Noun a line of rocky peaks the peak of the roof The recipe says to beat the cream until it forms soft peaks. At her peak she was writing a new novel every year. Violence reached a peak just before the election. The graph shows that murders in the city declined from a peak of 173 in 2004. Adjective The factory has been running at peak capacity for the past year. the peak season for fishing
Recent Examples on the Web
The largest twister touched down in Arkwright and had peak winds of 110 mph. Christopher Cann, USA TODAY, 11 July 2024 Temperatures are max out at 91 degrees across Central Florida, with a peak heat index of 101 degrees in Daytona Beach. Garfield Hylton, Orlando Sentinel, 11 July 2024
The White House has been working hard to highlight how, on balance, inflation has fallen since peaking in June 2022. Zachary Halaschak, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 12 July 2024 Research shows that synthetic caffeine may take slightly less time (a matter of minutes) to peak in your body than natural caffeine.3 What Is Natural Caffeine? Allison Herries, Verywell Health, 11 July 2024
Under a Trump presidency, peak inflation would be 0.6 percentage points higher than the current 3.3%, according to Oxford Economics’ analysis. Paolo Confino, Fortune, 10 July 2024 Residents and visitors can expect peak heat index values — which includes temperatures plus humidity — to feel between 105 and 110 degrees on both Wednesday and Thursday afternoons, the weather service said. Milena Malaver, Miami Herald, 3 July 2024 See all Example Sentences for peak 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'peak.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Noun, Verb (1), and Adjective

perhaps alteration of pike

Verb (2)

origin unknown

Verb (3)

from apeak held vertically

First Known Use


15th century, in the meaning defined at sense 3

Verb (1)

1887, in the meaning defined at transitive sense


1903, in the meaning defined at sense 1

Verb (2)

1605, in the meaning defined at sense 1

Verb (3)

1626, in the meaning defined at sense 1

Time Traveler
The first known use of peak was in the 15th century

Dictionary Entries Near peak

Cite this Entry

“Peak.” Dictionary, Merriam-Webster, Accessed 23 Jul. 2024.

Kids Definition


1 of 2 noun
: a part of a piece of clothing that is pointed or sticks out
especially : the front part of a cap or hat
: the top of a hill or mountain
: a mountain all by itself
: the highest point of development
the peak of perfection
peak adjective


2 of 2 verb
: to reach or cause to come to a peak, point, or maximum

More from Merriam-Webster on peak

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