What is your e-mail address?

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!

is Verb

— A form of the verb be when talking about someone or something else. He is late for class. Is it hot in here?

your Pronoun

— Your things are things which belong to you. Can I eat some of your ice-cream please?

e Noun

— E is the fifth letter of the alphabet, and is the most common vowel and letter used in the English language. "d" comes before "e" — The constant e is a real number that has formula math \mathrm{e}=\lim_{n \to \infty}\left(1+\frac{1}{n}\right)^{n}/math, and is approximately 2.718281828.

mail Noun

— Mail is the messages and packages that you send to other people. There's no mail today because the post office is closed. The new book arrived in the mail.

mail Verb

— If you mail something, you send it through the post. I mailed a birthday card to him last week.

address Noun

— An address is the location where a building is or where a person lives.

address Verb

— If you address a group, you talk in front of it. The Prime Minister will address the United Nations. — If you address a letter, you write an address on it. She addressed the envelope to "Mr. John Black."