We use language to express inner thoughts and emotions, make sense of complex and abstract thought, to learn to communicate with others, to fulfill our wants and needs, as well as to establish rules and maintain our culture.
Language can be defined as verbal, physical, biologically innate, and a basic form of communication.
Behaviourists often define language as a learned behaviour involving a stimulus and a response.
Often times they will refer to language as verbal behaviour, which is language that includes gestures and body movements as well as spoken word