compost

Universal Words noun, verb noun [U,C] a mixture of decayed plants, food, etc. that can be added to soil to help plants grow: potting compost (= a mixture of soil and compost that you can buy to grow new plants in) * a compost heap (= a place in the garden where leaves, plants, etc. are piled, to make compost) verb [VN] 1 to make sth into compost: Cover the area with composted bark or peat. 2 to put compost on or in sth