What part of speech is the word mine?

"Mine" can be two different parts of speech, depending on how it's used:

* Pronoun: When used to indicate possession, like "This is mine," it acts as a pronoun.

* Adjective: When used to describe something as belonging to the speaker, like "That's my car, and this is mine," it acts as an adjective.

Let me know if you'd like more examples!