compost heap

: a mixture that consists largely of decayed organic matter and is used for fertilizing and conditioning land

: mixture, compound

: to convert (a material, such as plant debris) to compost

: a collection of things thrown one on another : pile

: a great number or large quantity : lot

: to throw or lay in a heap : pile or collect in great quantity

: to form or round into a heap

: to form a heap on : load heavily