empiricism, in philosophy, the view that all concepts originate in experience, that all concepts are about or applicable to things that can be experienced, or that all rationally acceptable beliefs or propositions are justifiable or knowable only through experience. This broad definition accords with the derivation of the term empiricism from the ancient Greek word empeiria, “experience.”
Concepts are said to be “a posteriori” (Latin: “from the latter”) if they can be applied only on the basis of experience, and they are called “a priori” (“from the former”) if they can be applied independently of experience. Beliefs or propositions are said to be a posteriori if they are knowable only on the basis of experience and a priori if they are knowable independently of experience (see a posteriori knowledge). Thus, according to the second and third definitions of empiricism above, empiricism is the view that all concepts, or all rationally acceptable beliefs or propositions, are a posteriori rather than a priori.
The first two definitions of empiricism typically involve an implicit theory of meaning, according to which words are meaningful only insofar as they convey concepts. Some empiricists have held that all concepts are either mental ... (200 of 6,031 words)