Concrete Noun:
* "I went to the market to buy some groceries." Here, "market" refers to a physical place, a building or area where goods are sold. This is a concrete noun because it represents a tangible entity.
Abstract Noun:
* "The company is trying to understand the market for its new product." In this case, "market" refers to a concept, the potential buyers of a product or service. It's abstract because it's not a physical thing you can touch.
In conclusion: "Market" is a noun that can be either concrete or abstract, depending on how it's used in a sentence.