is the study of meaning in context dependent on the intentions of participants in a conversational exchange, Pragmatic deals with the meaning of the whole exchange.
Context, intentions and shared knowledge are the key words. Also cultural implications play an important role.
includes the material objects surrounding the communication event and any other features of the natural world that influence communication.
e.g. furniture and how it is arranged, size of the room, colors, temperature, time of day, etc. If you see a sign like this near a school: SLOW DOWN. PUPILS CROSSING THE STREET.