What exactly is the definition of Post-Modernism (pertaining to philosophy)?

Answer 1

There is no exact definition of it. Which is an appropriate state of affairs, because P-M writers tend to deny that any exact definitions of *anything* are available.

Modernism in philosophy is seen as the project to define such things as the self, meaning, rationality, truth, knowledge, and morality. P-M writers have launched a critical attack on the entire feasibility of that project.

In general, their attack tends to be self-refuting. For example, a critical demolition of the concept of meaning (language meaning) will nevertheless be expected to be understood by readers - that is, readers will be expected to find that it has meaning.

Answer 2

I don't have an exact definition, and I don't know that one exists. But post-modernism could be called the slacker movement of philosophy. One of its defining characteristics is a rejection of objectivity in all things; basically, everything is relative or subjective and one answer is as good as the next.

One of the few things that scientists and religious fundies can agree on, is that they both hate post-modernism. Scientists object to the post-modernist assertion that there is no objective truth, while the religious object to the moral relativism and the "one belief system is as good as the next". Post-modernism in education has been blamed for declining standards, as general concepts are stressed over concrete facts and pushing students to do better or be competitive is strongly discouraged.

You may want to check out the Wiki entry for post-modernism. It seems fairly accurate, but hey, if it's not, that's OK too. :-/