1. Noun
Any foul of filthy substance, as excrement, mud, dust, etc.; whatever, adhering to anything, renders it foul or unclean; earth; as, a wagonload of dirt.
2. Noun
Meanness; sordidness.
3. Noun
In placer mining, earth, gravel, etc., before washing.
4. Verb
To make foul of filthy; to dirty.
5. Noun
anything regarded as making something unclean
Vocabulary classified under Environmental science
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