The term 'BOARD UNIT' can be solved by the crossword solution MEAL, which is a four-letter word. A MEAL is a portion of food that is typically eaten at a specific time of day, such as breakfast, lunch, or dinner. Meals are usually composed of multiple dishes and can include both savory and sweet items. Meals are often shared with family and friends, and can be enjoyed in a variety of settings, from restaurants to home kitchens.