1Lunch; a polite term for the midday meal, usually eaten around noon.
毎日お昼に弁当を食べます。
I eat a bento for lunch every day.
今日はお昼を外で食べましょう。
Let's eat lunch outside today.
お昼休みに図書館で勉強した。
I studied in the library during the lunch break.
2Noon; midday. A polite way to refer to the middle of the day.
時計を見るとお昼の12時だった。
When I looked at the clock, it was noon (12:00).
夏はお昼の陽ざしが強い。
In summer the midday sun is strong.
お昼のニュースで台風の進路を確認した。
I checked the typhoon's path on the noon news.
3Daytime; during the day. A polite expression referring to things occurring in daylight hours.
お昼は犬の散歩をします。
I walk the dog during the daytime.
このサービスはお昼の時間帯によく利用される。
This service is often used during the daytime hours.
お昼の間は窓を開けて換気してください。
Please ventilate by opening the windows during the day.
4Waking up; getting up — an archaic honorific expression. Essentially unused in modern Japanese.