Postmodernity refers to a time period (roughly the mid to late 20th century to the present day), whereas Postmodernism refers to a way of thinking characteristic during that time period.
Postmodernism is an umbrella term to describe a number of different orientations, sub-movements and ways of thinking characterized by a self-conscious reaction to Modernism. It is the ripening of trends set in motion by the romantics and existentialists, particularly as regards the rejection of objective truth.
Key Points of Postmodernism
Postmodernism normally includes the following key elements: