Why definition, for what? for what reason, cause, or purpose?: Why did you behave so badly? See more. Dictionary.com; Word of the Day; Translate; Games; Blog. Why do you do what you do? Share: To get some of the best photos by email every week or two, enter your email address: You will get a. Why is lemon juice made with artificial flavor. Why do they call it a TV set when you only get one?. why; rhetorical questions Back to One-liners Humor; Your dreams can reveal elements of your state of mind you weren't aware of, and even help you make decisions or discoveries. why (wī, hwī) adv. For what purpose, reason, or cause; with what intention, justification, or motive: Why is the door shut? Why do birds sing? Why do leaves fall off trees Why do wolves howl Why is bullying bad Why do schools have uniforms Why was the Constitution written Why is NH3 polar. Full Definition of WHY : for what cause, reason, or purpose why did you do it? See why defined for English-language learners See why defined for kids ADVERTISEMENT. Why does God allow bad things to happen to good people? Why does God not prevent bad things from happening to good people? The interviewer catches you off guard with the simple question: Why do you want to work here? Learn how to tailor your answer and stand out. Welcome to WhyDoMath. Mathematical and computational analyses have proved to be uniquely insightful for solving a myriad of problems in science, society and our.