Definition of "how are you" in English

Phrase

1. An informal greeting, not requiring a literal response. In form a question, and thus followed by a question mark. Typical responses include:

   • I'm very well, thank you. How are you? (formal)I'm fine, thank you. / Fine, thanks. (informal) / Fine, and you? (informal)

2. (Following a noun phrase; stress on are) An expression of derision, that the preceding referent is unworthy of the name. In form of an exclamation, and thus often followed by an exclamation mark.