# erosion

/ɪˈɹoʊʒən/ (US) · /ɪɹˈəʊʒən/ (UK)

Source: https://englishreference.com/word/erosion
Updated: 2026-06-20

## Senses

### 1. geological wearing away

noun · CEFR B2

the process where rocks or soil are slowly destroyed and moved by wind, rain, or the sea.

For teachers: the geological process in which earthen materials are worn away and transported by natural forces such as water or wind.

- The heavy rain caused serious soil erosion on the farmers' fields.
- Coastal erosion has significantly altered the shoreline over the last decade, threatening several historic structures built near the cliff edge.

### 2. figurative loss

noun · CEFR C1 · Academic

the gradual loss or weakening of something like power, rights, or value.

For teachers: the gradual reduction or weakening of an abstract concept, such as authority, value, or social standards.

- High prices led to the erosion of the family's savings over time.
- Political analysts expressed concern regarding the steady erosion of civil liberties under the new emergency legislation.

### 3. medical/dental tissue loss

noun · CEFR C1 · Technical

the wearing away of the surface of a tooth or a shallow sore on the skin.

For teachers: the loss of the surface of a tissue, such as tooth enamel or mucous membrane, often due to chemical or mechanical action.

- Drinking too many sugary sodas can lead to the erosion of tooth enamel.
- The physician noted a slight gastric erosion, likely caused by the patient's prolonged use of anti-inflammatory medication.

### 4. image processing

noun · CEFR C2 · Technical

a way to make the shapes in a digital image thinner or smaller.

For teachers: a fundamental operation in morphological image processing that shrinks or thins objects in a binary image.

- The software used erosion to remove the small dots of noise from the scanned photo.
- By applying a 3x3 structuring element for erosion, the algorithm successfully disconnected the overlapping characters in the digital manuscript.

Usage: Often contrasted with 'dilation' in mathematical morphology.

## Examples

- Heavy rain caused soil erosion on the farm.
- The local government is planting trees along the coast to prevent further beach erosion caused by rising sea levels.
- Political analysts warned that the constant scandals led to a significant erosion of public trust in the democratic process, making future reforms difficult to implement.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.