erosion

American  

[ih-roh-zhuhn] / ɪˈroʊ ʒən /

noun

1. the act or state of eroding; state of being eroded.

2. the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc.

3. the gradual decline or disintegration of something.

   Each candidate is blaming the other’s party for the erosion of international trade.

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erosion British  

/ ɪˈrəʊʒən /

noun

1. the wearing away of rocks and other deposits on the earth's surface by the action of water, ice, wind, etc

2. the act or process of eroding or the state of being eroded

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erosion Scientific  

/ ĭ-rō′zhən /

1. The gradual wearing away of land surface materials, especially rocks, sediments, and soils, by the action of water, wind, or a glacier. Usually erosion also involves the transport of eroded material from one place to another, as from the top of a mountain to an adjacent valley, or from the upstream portion of a river to the downstream portion.

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erosion Cultural  

1. A type of weathering in which surface soil and rock are worn away through the action of glaciers, water, and wind.

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Other Word Forms

• antierosion
  adjective
• erosional
  adjective
• erosive
  adjective

Etymology

Origin of erosion

First recorded in 1535–45; from Latin ērōsiōn- (stem of ērōsiō ), derivative of ērōdere “to gnaw, eat away”; see origin at erode, -ion

Explanation

The Grand Canyon is a monumental example of erosion—the entire canyon was carved by the flow of the Colorado River, which slowly dug the canyon out of stone over the course of eons. Erosion is the wearing away of sand, soil, or rock by water or wind. But it also has a metaphorical sense. The erosion of standards for behavior in society means that our grandparents would be shocked by what passes for good manners today.

Example Sentences

Experts raised concerns about shoddy construction and signs of erosion.

From Salon • May 25, 2026

Leerink Partners downgraded Regeneron to Market Perform from Outperform, citing the latest trial upset as well as “Eylea erosion risk.”

From Barron's • May 18, 2026

The study relied on thermal history models, which help scientists trace how rocks cooled as they moved closer to Earth's surface during periods of mountain uplift and erosion.

From Science Daily • May 18, 2026

Traditionally, logs made of coir - coconut husk - have been imported from South-East Asia to reduce erosion, hold back water and also re-wet degraded peatland.

From BBC • May 15, 2026

But the fact that only a few of the lunar craters have extensive ray systems also reminds us that, even on the Moon, some erosion occurs.'

From "Cosmos" by Carl Sagan

Related Words

• corrosion
• decrease
• destruction
• disintegration