定休|ていきゅうteikyuu[0]heiban (flat)

1. nounregular holiday; fixed day off; regular closing day

• Synonym定休日ていきゅうびNeutralThe full word for a shop's or company's fixed closing day; 「定休」 is a shortened form, seen mostly on notices such as 「本日定休」.
• Antonym営業えいぎょうNeutralThe antonym: being open and doing business, the opposite of 「定休」, which marks the days a shop is regularly closed.

For a shop's or company's scheduled closure use 「定休」, as in 「毎週水曜定休」; the full word is 「定休日」. 「営業」 is the antonym, meaning open for business.

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

1. 定期的ていきてきに決きまっている休業きゅうぎょう（の日ひ）。