decompose

verb

de·​com·​pose ˌdē-kəm-ˈpōz How to pronounce decompose (audio)
decomposed; decomposing; decomposes

transitive verb

1
: to separate into constituent parts or elements or into simpler compounds
decompose water by electrolysis
decompose a word into its base and affixes
2
: rot

intransitive verb

: to break up into constituent parts by or as if by a chemical process : decay, rot
fruit decomposes
decomposable adjective
decomposition noun
Choose the Right Synonym for decompose

decay, decompose, rot, putrefy, spoil mean to undergo destructive dissolution.

decay implies a slow change from a state of soundness or perfection.

a decaying mansion

decompose stresses a breaking down by chemical change and when applied to organic matter a corruption.

the strong odor of decomposing vegetation

rot is a close synonym of decompose and often connotes foulness.

fruit was left to rot in warehouses

putrefy implies the rotting of animal matter and offensiveness to sight and smell.

corpses putrefying on the battlefield

spoil applies chiefly to the decomposition of foods.

keep the ham from spoiling

Examples of decompose in a Sentence

Bacteria and fungi help decompose organic matter. the smell of decomposing leaves The compound will decompose in the presence of light.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The clippings quickly decompose, adding nutrients to the soil in the process. Megan Hughes, Better Homes & Gardens, 22 Mar. 2025 Like the dog, their bodies were decomposing with some mummification, a consequence of body type and climate in Santa Fe's especially dry air at an elevation of nearly 7,200 feet (2,200 meters). CBS News, 15 Mar. 2025 The story follows a tech innovator who is marketing a software that allows clients to watch a feed of their deceased loved ones decomposing in real time. J. Kim Murphy, Variety, 14 Mar. 2025 Poor quality growing mediums tend to decompose more quickly. Tim Johnson, Chicago Tribune, 10 Mar. 2025 See All Example Sentences for decompose

Word History

Etymology

French décomposer, from dé- de + composer to compose

First Known Use

1718, in the meaning defined at transitive sense 1

Time Traveler
The first known use of decompose was in 1718

Browse Nearby Words

Cite this Entry

“Decompose.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/decompose. Accessed 7 Apr. 2025.

Kids Definition

decompose

verb
de·​com·​pose ˌdē-kəm-ˈpōz How to pronounce decompose (audio)
1
: to separate a thing into its parts or into simpler compounds
decompose water into hydrogen and oxygen
2
: to break down through chemical change : rot
decomposable adjective

Medical Definition

decompose

verb
de·​com·​pose ˌdē-kəm-ˈpōz How to pronounce decompose (audio)
decomposed; decomposing

transitive verb

: to separate into constituent parts or elements or into simpler compounds
decompose water by electrolysis

intransitive verb

: to undergo chemical breakdown : decay, rot
fruit decomposes
decomposability noun
plural decomposabilities
decomposable adjective

More from Merriam-Webster on decompose

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