The term ONE OF THREE SQUARES can be solved by two crossword solutions: MEAL (4 letters) and REPAST (6 letters). A MEAL is a portion of food that is eaten at a specific time, usually during the day. It is typically composed of several courses and is often accompanied by drinks. A REPAST is a MEAL that is served in honor of a special occasion or to celebrate an event. It is usually more elaborate than a regular MEAL and may include multiple courses.