din ‧ er /ˈdaɪnə $ -ər/ BrE AmE noun [countable]
1 . someone who is eating in a restaurant
2 . especially American English a small restaurant that serves cheap meals
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THESAURUS
▪ cafe/coffee shop a place where you can get coffee and other non-alcoholic drinks, cakes, and small meals
▪ fast food restaurant one where you can get meals such as hamburgers, french fries etc
▪ self-service restaurant one where you collect the food yourself
▪ diner American English a restaurant where you can eat cheap and simple food
▪ bistro a small restaurant or bar, especially one serving French-style food
▪ cafeteria ( also canteen British English ) a place at work or school where you can collect and eat meals