Definitions
1.nounSoil or earth.
2.nounA stain or spot (on clothes etc); any foreign substance that worsens appearance.
3.nounPreviously unknown facts, or the invented "facts", about a person."The reporter uncovered the dirt on the businessman by going undercover."
4.nounMeanness; sordidness.
5.nounIn placer mining, earth, gravel, etc., before washing.
6.nounFreckles
7.verbTo make foul or filthy; soil; befoul; dirty