Hal Foster begins his Preface to The Anti-Aesthetic: Essays on Postmodern Culture (1983) (reprinted as Postmodern Culture (1985)) with these questions: “Postmodernism: does it exist at all and, if so, what does it mean? Is it a concept or a practice, a matter of local style or a whole new period or economic phase? What are its forms, effects, place? How are we to mark its advent? Are we truly beyond the modern, truly in (say) a postindustrial age?” (vii). These questions concerned something which had already, by then, been around for almost fifty years, in name at least (Federico de Onís referred to postmodernismo in his Antología de la …
Coughlan, David. "Postmodernism". The Literary Encyclopedia. First published 20 December 2005; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=889, accessed 25 April 2015.]