午饭用英语可以表示为lunch，midday meal。

lunch

1、Shall we meet somewhere for lunch?

我们找地方见面一起吃个午饭好不好？ 

2、Only the extremely rich could afford to lunch at the Mirabelle

只有非常有钱的人才能在米拉贝勒餐厅吃得起午餐。 

3、He did not enjoy business lunches

他不喜欢吃工作午餐。 

4、If anyone wants me, I'm at lunch with a client.

有人找我，就说我在跟客户吃午餐。 

5、Having not yet lunched, we went to the refreshment bar for ham sandwiches.

我们都没吃午饭，于是便去小吃店买了火腿三明治

midday meal

1、Take a lunch break and enjoy a midday meal. 

安排午休时间，享用一顿美味的午餐。

2、The food provided for a midday meal. 

到中午为止，他们已经走了。

3、India's midday meal plan is one of the world's biggest school nutrition programmes. 

印度的免费午餐计划是世界上最大的校园营养计划之一。

4、In Europe, skiers not only stop for a midday meal, they take time to enjoy it. 

在欧洲，滑雪的人不仅停下来吃午餐，而且还藉此时间享受美味佳肴带来的乐趣。

5、If you go to Britain to study English and stay with a family, you will almost certainly be given a packed lunch to eat for your midday meal. 

如果你到英国学习英语并且住在一个英国家庭里，那你肯定会得到一份盒装午餐作为午饭。