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

For instance, the rod-leading technique led to decomposition of WC near the top portion of the build, which created defects in the finished material.

From Science Daily • Mar. 13, 2026

Dr Shepherd said the condition of her body was "consistent with mummification" as the cold winter air coming in through the open window "effectively turned the room into a fridge" and slowed down decomposition.

From BBC • Feb. 21, 2026

Slower colonization could delay carbon decomposition and reduce habitat formation for the many species that typically live inside Xylophaga burrows.

From Science Daily • Dec. 28, 2025

Cardan gives me a significant look as she explains decomposition, rot.

From "The Cruel Prince" by Holly Black

Related Words

• decay
• disintegration