昼飯|ひるめしhirumeshi[0]heiban (flat)

1. nounlunch; midday meal
   昼飯ちゅうはんでもいっしょにどうですか。↗

   Why don't we have lunch together?

• Synonym昼ご飯ひるごはんNeutralPolite, general-purpose word for lunch; more refined than the masculine, casual 「昼飯」, and safe in most situations.
• Synonymお昼おひるNeutralSoft-feeling word common in conversation; means lunch or midday itself, a broader range than 「昼飯」.
• SynonymランチNeutralLoanword for lunch or a lunch set; used mainly in restaurants, unlike the casual, masculine 「昼飯」.
• Synonym昼食ちゅうしょくWrittenFormal, written-flavored word for lunch, as in 「昼食付き」; the usual choice in formal contexts.
• Synonym午餐ごさんWrittenWritten, formal word for lunch, as in 「午餐会」; at home in formal prose, not casual talk.
• Related昼餉ひるげWrittenWord for the midday meal with an archaic flavor; rarely used in modern Japanese, unlike 「昼飯」.
• RelatedランチョンNeutralLoanword for lunch, often a rather formal luncheon event, as in 「ランチョンミーティング」.
• Related昼餐ちゅうさんWrittenWritten, little-used word for lunch; in everyday speech people say 「昼食」 instead.

「昼飯」 is a casual, masculine word for lunch. For polite everyday speech pick 「昼ご飯」 or 「お昼」; for formal contexts use 「昼食」, in written prose 「午餐」; at restaurants say 「ランチ」. 「ランチョン」 fits formal luncheons; 「昼餉」 and 「昼餐」 are rare, old-fashioned written words.

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

1. 昼御飯ひるごはん。