Definitions

1. noun

A dark, earthy substance rich in nutrients, resulting from the decomposition of plant and animal matter, used as a soil amendment to improve fertility and support plant growth.

“The gardener added humus to the soil to enhance its ability to retain moisture and support the growth of her flowers.”

2. verb

To produce or form humus, especially as a result of microbial activity.

“Microorganisms humus the organic matter, breaking it down into a nutrient-rich substance.”