Top Definition
Religion based on science.
Many fundamentalist Christians tell me that the world is six thousand years old. They say the Bible says so, indirectly, and they show this by comparing genealogies from Adam to Jesus. These add up to 4,000 years, and Jesus was born 2,000 years ago. I do NOT believe this because SCIENCE says otherwise.

by Agnos Morehead August 05, 2006
Claiming truth of a theory (or belief) based on the use of scientific methods to find evidence supporting the theory rather than to test or falsify it.
"Global Warming" believers use scientism to support their position.
by wuwt May 11, 2015

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