Umwelt
An umwelt (plural: umwelten; from the German Umwelt, meaning "environment" or "surroundings") is the specific way in which organisms of a particular species perceive and experience the world, shaped by the capabilities of their sensory organs and perceptual systems. In the semiotic theories of Jakob von Uexküll and Thomas Sebeok, it is considered to be the "biological foundations that lie at the very center of the study of both communication and signification in the human [and non-human] animal".