
decomposes; decomposed; decomposing
1 : to cause something (such as dead plants and the bodies of dead animals) to be slowly destroyed and broken down by natural processes, chemicals, etc.
[+ object]
Bacteria and fungi help decompose organic matter.
partially decomposed bodies
[no object]
The wood on our deck is beginning to decompose. [=(less formally) rot]
the smell of decomposing leaves
Synonyms see: DECAY
2 technical : to cause something (such as a chemical) to be separated into smaller or simpler parts
[+ object]
decompose a chemical compound
[no object]
The compound will decompose in the presence of light.
— decomposition /diˌkɑːmpəˈzɪʃən/ noun [noncount]
The wood is already showing signs of decomposition.
the decomposition of organic matter