中午那一餐（本義與動詞）
最樸素的本義就是中午吃的那一餐；把這一餐當動作講，就是去吃它。
midday meal · noun · A1
The meal between breakfast and dinner, eaten in the middle of the day.
午餐
核心畫面
You can picture 'lunch' very simply: the meal you eat in the middle of the day. Everything else is this one everyday meal — turned into a verb (to have it), or borrowed into a couple of fixed sayings.
可以想成最日常的一幕：白天中午吃的那一餐。其他用法都是從這一餐長出來的——把它變成動詞（去吃這一餐），或是被借進幾句…更多收起
可以想成最日常的一幕：白天中午吃的那一餐。其他用法都是從這一餐長出來的——把它變成動詞（去吃這一餐），或是被借進幾句固定的俗語裡。Two branches
借進俗語的午餐
「午餐」這個再普通不過的東西被借進固定說法裡，字面還是那一餐，意思卻指向別的——所以只在整句俗語裡成立，不能拆開單看。
there's no free lunch · noun · A2
Used in the saying 'there's no free lunch' to mean you cannot get something good without paying or working for it.
白吃的午餐
原始詞典資料6 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
lunchnoun/lʌnt͡ʃ/
- 1
A light meal usually eaten around midday, notably when not as main meal of the day.
- We made an odd party before the arrival of the Ten, particularly when the Celebrity dropped in for lunch or dinner.
- 2
ball-gamescricketgamesA break in play between the first and second sessions.
- 3
Any small meal, especially one eaten at a social gathering.
- After the funeral there was a lunch for those who didn't go to the cemetery.
- “Oh, you mustn’t dream of going home without your tea,” cried Anne in distress. “I’ll get it right off—I’ll go and put the tea down this very minute.” “I must go home,” repeated Diana, stupidly but determinedly. “Let me get you a lunch anyhow,” implored Anne. “Let me give you a bit of fruit-cake and some of the cherry preserves. […]”
- 4
obsoleteA thin piece or hunk (of bread, meat, etc.)
lunchverb/lʌnt͡ʃ/
- 1
To eat lunch.
- I like to lunch in Italian restaurants.
- The gentleman had left for London after lunch. Yes, alone; but he had lunched in the hotel with a lady.
- 2
To treat to lunch.
- We dined him, we lunched him, we were photographed in his company by flashlight.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。