Taking your veggie scraps and putting them in a worm bin is an example of to compost.
If you compost your grass clippings, you can improve your soil.
The soil mix used to fertilize and condition garden beds is an example of compost.
Origin of compost
- Middle English composte from Old French mixture, compost from Latin compositum mixture from neuter past participle of compōnere to put together component
From American Heritage Dictionary of the English Language, 5th Edition