Hyperreality is a concept in post-structuralism that refers to the process of the evolution of notions of reality, leading to a cultural state of confusion between signs and symbols invented to stand in for reality, and direct perceptions of consensus reality. Hyperreality is seen as a condition in which, because of the compression of perceptions of reality in culture and media, what is generally regarded as real and what is understood as fiction are seamlessly blended together in experiences so that there is no longer any clear distinction between where one ends and the other begins.

The term was proposed by French philosopher Jean Baudrillard, whose postmodern work contributed to a scholarly tradition in the field of communication studies that speaks directly to larger social concerns. Postmodernism was established through the social turmoil of the 1960s, spurred by social movements that questioned preexisting conventions and social institutions. Through the postmodern lens, reality is viewed as a fragmented, complimentary and polysemic system with components that are produced by social and cultural activity. Social realities that constitute consensus reality are constantly produced and reproduced, changing through the extended use of signs and symbols which hence contribute to the creation of a greater hyperreality.

The postmodern semiotic concept of hyperreality was contentiously coined by Baudrillard in Simulacra and Simulation (1981). Baudrillard defined "hyperreality" as "the generation by models of a real without origin or reality"; and his earlier book Symbolic Exchange and Death. Hyperreality is a representation, a sign, without an original referent. According to Baudrillard, the commodities in this theoretical state do not have use-value as defined by Karl Marx but can be understood as signs as defined by Ferdinand de Saussure. He believes hyperreality goes further than confusing or blending the 'real' with the symbol which represents it; it involves creating a symbol or set of signifiers which represent something that does not actually exist, like Santa Claus. Baudrillard borrows, from Jorge Luis Borges' "On Exactitude in Science" (already borrowed from Lewis Carroll), the example of a society whose cartographers create a map so detailed that it covers the very things it was designed to represent. When the empire declines, the map fades into the landscape. He says that, in such a case, neither the representation nor the real remains, just the hyperreal.

Baudrillard's idea of hyperreality was heavily influenced by phenomenology, semiotics, and the philosophy of Marshall McLuhan. Baudrillard, however, challenges McLuhan's famous statement that "the medium is the message," by suggesting that information devours its own content. He also suggested that there is a difference between the media and reality and what they represent. Hyperreality is the inability of consciousness to distinguish reality from a simulation of reality, especially in technologically advanced societies. However, Baudrillard's hyperreality theory goes a step further than McLuhan's medium theory: "There is not only an implosion of the message in the medium, there is, in the same movement, the implosion of the medium itself in the real, the implosion of the medium and of the real in a sort of hyperreal nebula, in which even the definition and distinct action of the medium can no longer be determined".

Italian author Umberto Eco explores the notion of hyperreality further by suggesting that the action of hyperreality is to desire reality and in the attempt to achieve that desire, to fabricate a false reality that is to be consumed as real. Linked to contemporary western culture, Umberto Eco and post-structuralists would argue that in current cultures, fundamental ideals are built on desire and particular sign-systems. Temenuga Trifonova from University of California, San Diego notes,

[...]it is important to consider Baudrillard's texts as articulating an ontology rather than an epistemology.

Hyperreality is significant as a paradigm to explain current cultural conditions. Consumerism, because of its reliance on sign exchange value (e.g. brand X shows that one is fashionable, car Y indicates one's wealth), could be seen as a contributing factor in the creation of hyperreality or the hyperreal condition. Hyperreality tricks consciousness into detaching from any real emotional engagement, instead opting for artificial simulation, and endless reproductions of fundamentally empty appearance. Essentially (although Baudrillard himself may balk at the use of this word), fulfillment or happiness is found through simulation and imitation of a transient simulacrum of reality, rather than any interaction with any "real" reality.

While hyperreality is not a new concept, its effects are more relevant in modern society, incorporating technological advancements like artificial intelligence, virtual reality and neurotechnology (simulated reality). This is attributed to the way it effectively captured the postmodern condition, particularly how people in the postmodern world seek stimulation by creating unreal worlds of spectacle and seduction and nothing more. There are dangers to the use of hyperreality within our culture; individuals may observe and accept hyperreal images as role models when the images don't necessarily represent real physical people. This can result in a desire to strive for an unobtainable ideal, or it may lead to a lack of unimpaired role models. Daniel J. Boorstin cautions against confusing celebrity worship with hero worship, "we come dangerously close to depriving ourselves of all real models. We lose sight of the men and women who do not simply seem great because they are famous but who are famous because they are great". He bemoans the loss of old heroes like Moses, Julius Caesar and Abraham Lincoln, who did not have public relations (PR) agencies to construct hyperreal images of themselves. The dangers of hyperreality are also facilitated by information technologies, which provide tools to dominant powers that seek to encourage it to drive consumption and materialism. The danger in the pursuit of stimulation and seduction emerge not in the lack of meaning but, as Baudrillard maintained, "we are gorged with meaning and it is killing us."