<p><strong>Adverb</strong></p><ul><li>in what way or manner;</li><li>by what means?: How did the accident happen?</li><li>to what extent, degree, etc.?: How damaged is the car?</li><li>in what state or condition?: How are you?</li><li>for what reason; why?: How can you talk such nonsense?</li><li>to what effect; with what meaning?: How is one to interpret his action?</li><li>what?: How do you mean?</li><li>If they don't have vanilla, how about chocolate? (used as an intensifier): How seldom I go there!</li><li>by what title or name?: How does one address the president?</li><li>at what price: How are the new cars going, cheaper than last year's models?</li><li>by what amount or in what measure or quantity?: How do you sell these tomatoes?</li><li>in what form or shape?: How does the demon appear in the first act of the opera?</li><li>How does the medication come?</li></ul><p><strong>Conjunction</strong></p><ul><li>the manner or way in which: He couldn't figure out how to solve the problem.</li><li>about the manner, condition, or way in which: I don't care how you leave your desk when you go. Be careful how you act.</li><li>in whatever manner or way; however: You can travel how you please.</li><li>Informal. that: He told us how he was honest and could be trusted.</li></ul><p><strong>Noun</strong></p><ul><li>a question concerning the way or manner in which something is done, achieved, etc.: a child's unending whys and hows.</li><li>a way or manner of doing something: to consider all the hows and wherefores.</li><li>a word formerly used in communications to represent the letter H.</li></ul>