Lunch
noun
The noon meal is the meal you eat at noon. What meal is that? It's delicious, delicious lunch.
Like many food words, 昼ご飯 is often used with the honorific prefix お, making it お昼ご飯. You'll sometimes see this shortened down to just お昼, but don't be fooled, as it still means "lunch" — the ご飯 part is implied.
The readings come from the words 昼 and ご飯. If you know how to read those words you can read this word as well.
昼ご飯にはカレーライスが食べたいです。
I want to eat curry rice for lunch.
昼ご飯は、ピザを注文しない？
Why don't we order pizza for lunch?
今日は昼ご飯を食べる時間はありませんでした。
There was no time for lunch today.