お昼|おひるohiru[2]nakadaka (mid-high)

1. nounlunch
   お昼ひるをおごってくれたのを覚おぼえてますか。↗

   Do you remember buying me lunch?
2. nounnoon; midday
   お昼ひるまでには戻もどってきなさい。↗

   You are supposed to be back by noon.
3. noundaytime
4. nounwaking up; getting up; rising

• Synonym昼飯ひるめしCasualRough, casual male speech for lunch, as in 「昼飯食った？」; cruder than 「お昼」.
• Synonym昼ご飯ひるごはんNeutralMeans lunch and is used by both men and women; more clearly refers to the meal itself than 「お昼」.
• SynonymランチNeutralLoanword for lunch or a Western-style single-plate lunch set (「ランチメニュー」); used mostly in restaurants.
• Related昼ひるNeutralRefers to noon or daytime, and by extension lunch; 「お昼」 is its politer form.
• Related昼餉ひるげWrittenWritten word for lunch with an old-fashioned, literary flavor.
• Related午餐ごさんWrittenWritten word for lunch, typical of formal banquets as in 「午餐会」.
• Related昼餐ちゅうさんFormalFormal term for lunch, used on solemn occasions or in writing; in everyday speech say 「お昼」 or 「昼ご飯」.

For everyday lunch, 「お昼」 and 「昼ご飯」 are the defaults; men use casual 「昼飯」, restaurants say 「ランチ」, and formal luncheons take 「午餐会」. 「昼」 covers noon and daytime, while 「昼餉」 and 「昼餐」 are literary or formal.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 昼ひる。
2. 昼食ちゅうしょく。