dinner不仅仅指晚饭，还有正餐的说法。正餐可以在中午也可以在晚上。
Some people have dinner at noon, and other people have dinner in the evening.
有些人在中午吃正餐,还有些人在晚上吃正餐。
所以泛泛地说吃饭也是可以用havedinner的。
早餐：have breakfast,
午餐：have lunch
晚餐：have dinner
其他时候：get something to eat / have snack
have a meal
最简单的就是eat
或 Eating meal
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