The term 'diner courses' refers to the traditional courses served in a diner. These typically include salads, entrees, sides, and desserts. The crossword solution for the term 'diner courses' is SALADS, which is a type of dish consisting of a mixture of small pieces of food, usually vegetables, fruits, and/or nuts, served with a dressing. Salads are often served as a starter or side dish, but can also be served as a main course.