Body language refers to various forms of nonverbal communication, where in a person may reveal clues as to some unspoken intention or feeling through their physical behavior. These behaviors include (but are not limited to) facial expressions, body posture, gestures, eye movement, touch and the use of space. Body language exists in both animals and humans, but this article focuses on interpretations of human body language. It is also known as kinesics.
Body language must not be confused with sign language, as sign languages are full languages like spoken languages and have their own complex grammar systems, as well as being able to exhibit the fundamental properties that exist in all languages.Body language, on the other hand, does not have a grammar and must be interpreted broadly, instead of having an absolute meaning corresponding with a certain movement, so it is not a language like sign language and is simply termed as a "language" due to popular culture. The factors about body language are:
Other subcategories of body language,
Tone of voice,
Universal vs. culture-specific body language,