Peirce, Charles Sanders Syllabification: (Peirce, Charles Sanders)Pronunciation: /pi(ə)rs/Definition of Peirce, Charles Sanders (1839–1914), US philosopher and logician. A founder of pragmatism in the US, he argued that the meaning of a belief is to be understood by the actions and uses to which it gives rise. Peirce, Charles Sanders in other Oxford dictionaries Definition of Peirce, Charles Sanders in the British & World English dictionary