What is Buddhist Modernism? This question refers to "Buddhist Modernism" however I'm not sure what it is. It is a term that I have heard crop up in a few other places. Is it a reformation movement within Buddhism? If so what is it reforming and when did it occur? Is it particular to one school of Buddhism? Is it a related concept to Navayana Buddhism perhaps? Is it a real movement at all or just convenient shorthand for Buddhism as it enters the modern world?
Buddhist modernism just refers to Buddhists who only accept the aspects of Buddhism they consider to be compatable with the modern world. Usually the term is used to describe Buddhists who reject things like Karma and Rebirth but still see the Dharma as having things to offer. It's not a movement, just a catch all term used to describe people like that.

I think it is worth noting though that the term is relative to some extent. For one group of people it would be considered modernism to suggest that the traditional stories passed down aren't 100% accurate, and in other groups rejecting such stories might be the norm. I also think that there is a legitimate place for questioning and analyzing the core claims of Buddhism, although I think that the claims actually stand up whereas people who get called Buddhist modernists tend to think that's not the case for some of them.