Lunch or dinner is a MEAL that is typically eaten in the middle of the day or in the evening. The term 'lunch or dinner' can be used to refer to either a light MEAL or a more substantial one. The crossword solutions for this term are MEAL, which has four letters, and REPAST, which has six letters. MEAL is a general term for any food that is eaten, while REPAST is a more formal term for a MEAL that is usually eaten at a specific time.