What does that mean?

what Pronoun

— What is used to ask for information about things. What did you see? What do you mean? — What is used to add a clause with more information. I don't know what you mean. I'll tell you what to do. I'll see what I can do to help. — What is used when you want to describe something instead of naming it. Take what you can find. Can I see what you did? I could change it if that's what you want.

what Determinative

— What is used to ask about the member(s) of a group. What book did you buy? — What is used to add a clause to identify the member(s) of a group. I don't know what problems you mean. I'll tell you what button to push. I'll see what food I can give.

what Adjective

— used to show that you feel strongly about something. What a great book this is!

does Noun

— A female deer. We saw three does at the zoo.

that Determiner

— Used to show which thing we are talking about; used with things that are not close to the speaker. Give me that book, not this one. Give me that, not this. That dog is hungry.

that Subordinator

— used to link a subordinate clause to a main one You said that you liked me. Give me the book that I dropped.

mean Verb

— A word means something when the word expresses the same idea as the other something. Slay means kill. Both of them mean to make dead.

mean Adjective

— When you are a mean person, you are not nice. The boys who hit you were very mean.

mean Noun

— The mean is a measure of the average of a list of numbers. The sum total of the numbers divided by how many numbers in the list. The mean of the numbers 2,3,4 is 3. (2+3+4)/3 = 9/3 = 3.