DictionarycompostSoil-enriching organic matter
noun / verb

compost

KAHM-pohst/ˈkɑːmpəʊst/

Decayed organic matter used to enrich soil, or making it from organic waste.

Dark, crumbly compost lies beside partially decomposed leaves in the wooden bin.

Rich crumbly dark compost beside recognizable partially decomposed leaves in small wooden compost bin, no flies or text.
Etymology

“Putting together” gave a word for a mixture, including leaves and manure used on land. That mixture sense underlies today's decayed organic material used to enrich soil.

In context

Gardener Scott8:01
in fixing some of your soil problems and often the fix is an organic matter like compost because when you have that very small clay particle and you put some compost in it
Understanding Soil (The Key to Success)

More examples

  • She composts vegetable scraps in a bin behind the house.
  • Add a layer of compost around the tomato plants.
  • The fallen leaves are composted instead of sent to a landfill.

Forms

compost · composts · composted · composting

composter noun — A container used to turn waste into compost.

compostable adjective — Able to break down into usable compost.

Similar words

fertilizer
Supplies plant nutrients but need not contain decayed organic matter.
humus
Stable decomposed organic matter in soil, rather than a prepared amendment.