Umwelt is a German word meaning environment or surrounding world. Jakob von Uexkull and Thomas A Sebeok came up with semiotic theories that included the idea of umwelt.
Umwelt is the biological foundations that lie at the very epicenter of the study of both communication and signification of the human animal. The term is usually translated as “self-centered world.”
The theory contains the idea that organisms can have different unwelten, even though they share the same environment. Each functional component of an Umwelt has a meaning and represents the organism’s model of the world.
An organism creates and reshapes its own Umwelt when it interacts with the world. It is dependent on the way the species of animal’s senses receive the world.
The theory states that the mind and the world are inseparable. Therefore the umwelten of each animal differs. When two Umwelten interact, this creates a semiosphere.