high-water mark

American  

[hahy-waw-ter, -wot-er] / ˈhaɪˈwɔ tər, -ˈwɒt ər /

noun

1. a mark showing the highest level reached by a body of water.

2. the highest point of anything; acme.

   Her speech was the high-water mark of the conference.

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high-water mark British  

noun

1. 1. the level reached by sea water at high tide or by other stretches of water in flood

   2. the mark indicating this level

2. the highest point

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high-water mark Idioms  

1. The peak of something, especially an achievement. For example, This composition is the high-water mark of his entire output. This expression alludes to the highest mark left on shore by the tide. [Mid-1800s]

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Etymology

Origin of high-water mark

First recorded in 1545–55

Example Sentences

See Examples For:

high-water mark

Canada has sometimes been referred to as the "forgotten host" of this World Cup, but for the men's national team and its supporters, the performance during the tournament will be an unforgettable high-water mark.

From BBC ● Jul. 8, 2026

Still, there are signs the 4.2% yearly rate of inflation in May could be the high-water mark of the latest bout of inflation.

From MarketWatch ● Jun. 10, 2026

For the U.S. and Mexico the goal is to get beyond the quarterfinals, the high-water mark for both countries in the modern era.

From Los Angeles Times ● Jun. 8, 2026

Soon, we were back on the vaporetto for a sunset ride to Al Covo, the culinary high-water mark of our family trip to Venice a decade earlier—and our parents’ honeymoon 25 years before that.

From The Wall Street Journal ● May 2, 2026

When the counterfeit Beast was perfected, the knights took it away and hid it in a cave at the foot of the cliffs, above high-water mark.

From "The Once and Future King" by T. H. White

Related Words

• apex
• apogee
• upper limit