Noun
(philosophy) the doctrine that the meaning of a proposition consists of the operations involved in proving or applying it
Source: WordNetHis move from positivism to operationalism can be clearly understood as a reaction on the advent of Schrödinger’s wave mechanics which, in particular due to its intuitiveness, became soon very popular among physicists. Source: Internet
Similarly, Percy Williams Bridgman is credited with the methodological position known as operationalism, which asserts that all observations are not only influenced, but necessarily defined by the means and assumptions used to measure them. Source: Internet