Nonverbal communication, sometimes called "Body Language" is any sort of communication which is done without words. Please note, American Sign Language other national sign languages are NOT nonverbal communication, because sign language is infinitely creative, and as equally complex as spoken language.

Nonverbal signals, unlike their verbal counterparts, are not things that are taught. While they are largely culturally defined, they are not learned in the traditional sense. While a young child who receives socks for Christmas may say "Thanks grandma...", his disappointment shows clearly on his face. The nonverbal signals representing his disappointment are merely physiological reactions to his current emotional state.

Nonverbal messages are encoded in a variety of ways; this variety is broken down into two categories: simple and complex. Simple encoding happens naturally and is such that the receiver of the message can easily decode the message and retrieve the meaning. Simple encoding is often (if not always) involuntary. Complex encoding requires a thoughtful effort. One form of complex encoding takes place when we decide how we wish to communicate. We do not, one would presume, speak in the same manner with our professors and employers that we speak with our friends or family. Neither do we dress the same way for a job interview that we would for a night at the movie theater. Also, a form of complex encoding is used when coordinating verbal signals with their nonverbal counterparts. An example of this would be nodding while agreeing verbally. Nonverbal communication also serves to complement our spoken communication. Saying that we're really excited about something is one thing, but unless it is visible on our faces and in our gestures, it does not carry the same message.