Why is the door closed?

why Adverb

— Used to ask the reason for something. Why did you say that? Why did you try to steal money from this shop? — Used to talk about the reason for something. I wonder why he did that. — Used to give more information about the reason for something. Can you tell me the reason why he did that?

why Interjection

— Used to show a person's surprise or impatience about something. Why! Thank you for the present.

why Noun

— (plural: whys) The reason to something. Whenever you begin to write an essay, please do not forget to talk about the who, the what, the when, the where, the why and the how. — (plural: whies) A why is a young cow or woman.

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?

the Determiner

— Used, instead of a, to reference something specific, already known to exist. Compare "I read a book." and "I read the book." — Used with a stress, to show that the word following is special. Are you the John Smith that I went to school with? — Used with an adjective that acts like a noun to mean all of the people concerned The poor are always with us. — Used with superlatives forms of adjectives and adverbs. You are the best.

door Noun

— A piece of a wall that can be opened (leaving a hole in the wall to walk through) or closed (covering the hole). Some doors are on hinges; others slide. Please open the door for him. His hands are full.

closed Adjective

— Not open. The store is closed on the weekends. — Not available to the public. I used a closed source to write the article.