日曜日|にちようびnichiyoubi[3]nakadaka (mid-high)

1. noun, adverbSunday
   その店みせは日曜日にちようびは閉しまっている。↗

   The shop is closed on Sundays.

• Synonym日曜にちようNeutralShortened form of 「日曜日」, often seen in schedules and timetables; also common in everyday speech.
• Related主日しゅじつNeutralChristian term for Sunday as the Lord's Day, used in both speech and writing but only in church contexts; say 「日曜日」 otherwise.
• Antonym平日へいじつNeutralThe opposite of 「日曜日」: days other than Sundays and holidays, i.e. weekdays. Saturdays are sometimes counted as 「平日」.

For Sunday, 「日曜日」 is the default. Use the shorter 「日曜」 in schedules and casual talk, 「主日」 only in Christian contexts, and 「平日」 for weekdays.

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

1. 週しゅうの第だい一いち日にち。第だい七なな日にちとする国くにも多おおい。日曜にちよう。
2. 休日きゅうじつを意味いみする換喩かんゆ。