...a general philosophical position, also called logical empiricism, developed by members of the Vienna Circle on the basis of traditional empirical thought and the development of modern logic. Logical positivism confined knowledge to science and used verificationism to reject metaphysics not as false but as meaningless. The importance of science led leading logical positivists to study scientific method and to explore the logic of confirmation theory. www.filosofia.net/materiales/rec/glosaen.htm
Positivism was a school of thought which originated in the 1920s and 1930s which essentially held that all propositions, whether metaphysical or physical, are meaningless unless they can be empirically verified (the verification principle ). However, the idea was a self-refuting proposition since it could not be empirically verified itself - ie logical positivism , like other propositions, could not pass the test of empirical verification. www.apologetics.org/glossary.html
The philosophy of the Vienna Circle, according to which any purported statement of fact, if not a verbal truism, is meaningless unless certain conceivable observations would serve to confirm or deny it. highered.mcgraw-hill.com/sites/076742011x/student_view0/chapter13/glossary.html
positivism: the form of empiricism that bases all knowledge on perceptual experience (not on intuition or revelation) wordnet.princeton.edu/perl/webwn
Logical positivism (later referred to as logical empiricism) holds that philosophy should aspire to the same sort of rigor as science. Philosophy should provide strict criteria for judging sentences true, false and meaningless. en.wikipedia