Definition of humus
geology : a brown or black complex variable material resulting from partial decomposition of plant or animal matter and forming the organic (see 1organic 3a(1)) portion of soil
Recent Examples of humus from the Web
The composting process employs billions of microorganisms to break down organics into the essential component of soil called humus.
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HUMUS Defined for English Language Learners
Definition of humus for English Language Learners
: a brown or black material in soil that is formed when plants and animals decay
HUMUS Defined for Kids
Definition of humus for Students
: the dark rich part of earth formed from decaying plant or animal material
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