Grammar Note
作“晚餐/正餐”讲时通常不可数（have dinner）；指“晚宴、宴席”等具体场合时为可数名词（a dinner, dinners）。
正餐；晚餐
先理解核心含义，再看它在真实句子里的用法。
正餐；晚餐
The main meal of the day, usually eaten in the evening.
We usually have dinner at seven o'clock in the evening.
我们通常晚上七点吃晚饭。
一天中的主餐,通常在晚上吃
The main meal of the day, often eaten in the evening.
一天中的主餐,晚餐或午餐
the main meal of the day served in the evening or at midday
晚餐
An evening meal.
聚餐
a party of people assembled to have dinner together
She invited us to dinner at her house to celebrate her birthday.
她邀请我们去她家吃晚饭，庆祝她的生日。
AI contextual example
I cooked dinner for my family last night; we had chicken and rice.
我昨晚为家人做了晚饭，我们吃了鸡肉和米饭。
AI contextual example
dinner will be at 8
晚餐八点开始。
WordNet
on Sundays they had a large dinner when they returned from church
每逢星期日,他们从教堂回来后都会吃一顿丰盛的晚餐。
WordNet
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作“晚餐/正餐”讲时通常不可数（have dinner）；指“晚宴、宴席”等具体场合时为可数名词（a dinner, dinners）。
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
Collins 词频等级为 4，建议结合例句记忆，而不是只背中文释义。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.