Here are some of the most common meanings:
* Interrogative pronoun: Used to ask questions about the identity, nature, or characteristics of something.
* Example: "What is your name?"
* Relative pronoun: Used to introduce a clause that provides more information about a noun.
* Example: "The book, what I read yesterday, was very interesting."
* Exclamatory word: Used to express surprise, amazement, or anger.
* Example: "What! You mean you didn't finish the project?"
* Adjective: Used to describe something as being unspecified, undefined, or indeterminate.
* Example: "What a beautiful day!"
* Pronoun: Used to refer to something that has already been mentioned.
* Example: "He said he would come, but what happened?"
To understand the exact meaning of "what" in a particular sentence, you need to consider the surrounding words and the context of the conversation.
Can you give me an example of a sentence where you'd like to know the meaning of "what"?