decomposition

American  

[dee-kom-puh-zish-uhn] / ˌdi kɒm pəˈzɪʃ ən /

noun

1. the act or process of decomposing.

2. the state of being decomposed; decomposed; decay.

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decomposition Scientific  

/ dē-kŏm′pə-zĭsh′ən /

1. The separation of a substance into simpler substances or basic elements. Decomposition can be brought about by exposure to heat, light, or chemical or biological activity.

2. The process of breaking down organic material, such as dead plant or animal tissue, into smaller molecules that are available for use by the organisms of an ecosystem. Decomposition is carried on by bacteria, fungi, protists, worms, and certain other organisms.

3. See more at detritivore

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Etymology

Origin of decomposition

1650–60; probably < French décomposition, derivative of décomposer to decompose; composition

Example Sentences

The researchers found the highest concentrations in the top layer of leaf litter, where decomposition has just begun.

From Science Daily • Mar. 23, 2026

Bodies are wrapped in a shroud of biodegradable material such as silk or wool before being placed in a pressurised chamber with hot water and chemicals, speeding up decomposition.

From BBC • Mar. 2, 2026

There, detectives discovered the body of 87-year-old William Mitchell, which had been in the mortuary room for 36 days and showed "obvious signs of decomposition", the court heard.

From BBC • Feb. 19, 2026

Some may be transformed into compounds that microbes can further break down, while others could become even more resistant to decomposition.

From Science Daily • Feb. 9, 2026

There's little of the decomposition you see on most long-dead shamblers, none of the older clothing or loose hanging skin.

From "Dread Nation" by Justina Ireland

Related Words

• decay
• disintegration