Is dirt an abstract or concrete and why?

Answer 1

"dirt" is a concrete noun because you can see it and touch it ...

"freedom" is an abstract noun because it's not visible or touchable ...

http://www.chompchomp.com/terms/concretenoun.htm

http://www.chompchomp.com/terms/abstractnoun.htm

Answer 2

If you want to dig up the dirt on someone, then it becomes just information, a more abstract quantity.

Many nouns in English have several meanings, some concrete, others more abstract, or metaphorical.