The term 'du jour' is a French phrase meaning 'of the day'. It is used to refer to a dish or menu item that is offered on a particular day, usually one that is different from the regular menu. The crossword solutions for this term are PLAT (4 letters), CARTE (5 letters), and SOUPE (5 letters). A PLAT is a main course in French cuisine, a carte is a menu, and soupe is a type of soup. Together, these three words represent a meal that is offered on a particular day, which is the definition of du jour.