The world is, in a philosophical sense, everything that is seen and percieved by human intellect and human senses, even though some branches of philosophy may refer to different "worlds", making a reference to the different realms of philosophy (such as the mathematical world, the intelligible world, the world of ideas and concepts and so on) which are all intertwined to create what we call "reality" or the layman's definition of the world. Although the very concept of world is debatable for some adherents to philosophical worldviews such as followers of solipsism, the vast majority of people agree that we are experiencing what we believe to be a coordinate system of experiences. A concept is an abstract, idea, notion, or entity that serves to designate a category or class of entities, events, phenomena or relations between them. ... This article or section contains information that has not been verified and thus might not be reliable. ... This page is about the general concept; for the concept in roleplaying games, see experience point. ...

This concept was first introduced by Hegel and then it was subsequently modified by latter philosophers such as Immanuel Kant or Martin Heidegger, who introduced potentially troublesome concepts such as category or the "ding an sich", which shattered the generally accepted and set version of a static and intelligible world that pervaded the philosopical insight of reality before. Georg Wilhelm Friedrich Hegel (August 27, 1770 - November 14, 1831) was a German philosopher born in Stuttgart, Württemberg, in present-day southwest Germany. ... Immanuel Kant (22 April 1724 – 12 February 1804), was a German philosopher from Königsberg in East Prussia (now Kaliningrad, Russia). ... Martin Heidegger (September 26, 1889 – May 26, 1976) was a German philosopher, considered by some to be one of the most influential philosophers of the 20th century. ... Look up category in Wiktionary, the free dictionary. ...

It is worth mentioning that the philosophical debate on the definition of the world is far from being settled, and that no general agreement has been reached as to what would be an acceptable and coherent definition of "world". This debate involves a number of philosophical branches such as Epistemology. It has been suggested that this article or section be merged with Knowledge. ...

See also

• Dasein
• Existence
• Sein und Zeit