Delineated describes something that has been clearly portrayed or accurately represented. Read a love letter in which your admirer’s feelings are delineated, and you don’t have any doubt how the author feels about you.
The word delineated can describe something — like a diagram or map — that was literally drawn clearly. More often, you will hear the word in relation to something less tangible — like how a character in a novel is delineated, or depicted, by an author, or a politician who gave a speech in which her position was delineated, or defined. You might try to remember the word delineated by thinking of it as something with clearly defined lines.
