Definition of: dirt

(dûrt) noun
1. Any foul or filthy substance; refuse; trash.
2. Loose earth: garden loam.
3. Uncleanness in action or speech; abuse or obscenity.
4. In placer mining, washed–down material or detritus containing precious metal: called pay dirt when it yields more than enough to compensate for working.
—adjective Made of earth: a dirt road. [Metathetical var. of earlier drit <ON, dirt, bird droppings]