Is the word mall an adjective?

No, "mall" is generally a noun. It refers to a shopping center or a large building with many shops.

However, "mall" can sometimes be used as an adjective in informal contexts, meaning "related to a shopping mall". For example:

* "I got a great deal on a new TV at the mall electronics store."

But it's important to note that this usage is not as common as using "mall" as a noun.