Structuralist Poetics : Structuralism, Linguist... Online
Langue is the abstract system of rules (Grammar), while parole is the actual speaking we do.
Why do you know that a "dark and stormy night" in a novel suggests something bad is coming, but the same sentence in a weather report is just a fact? Structuralist poetics : structuralism, linguist...
The word "Rose" (the sound/ink) is the signifier . The concept of a flower is the signified . Langue is the abstract system of rules (Grammar),