# deformation

/ˌdifɔɹˈmeɪʃən/ (US) · /dɪfɔːmˈeɪʃən/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/deformation
Updated: 2026-05-08

## Definition

a change in the shape or size of an object because of pressure, heat, or weight.

For teachers: the alteration of an object's original shape or size due to an applied force or a change in temperature. Often used in engineering and physics to describe structural failure or material stress.

## Examples

- The heavy weight caused a permanent deformation in the metal bar.
- Engineers must calculate the expected deformation of the bridge cables under the weight of heavy traffic.
- Geologists study the crustal deformation that occurs along fault lines to better understand the seismic forces that lead to major earthquakes.

## Usage notes

- Uncountable when referring to the general process; countable when referring to a specific instance of a distorted shape.

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