compost
US /ˈkɑːm.poʊst/
UK /ˈkɑːm.poʊst/

1.
a mixture of decaying organic matter, such as leaves and manure, used to fertilize soil
:
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She added a layer of compost to her vegetable garden.
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The city encourages residents to make their own compost from kitchen scraps.
1.
make (vegetable matter or a place) into compost
:
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We need to compost all the garden waste.
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It's easy to compost your kitchen scraps.