the day of the week before Tuesday and following Sunday 星期一 I saw him on Monday. 我星期一看到过他。 the Monday before last. 上上星期一。 she's only in the office on Mondays. 她仅星期一在办公室。
adverb
(chiefly N. Amer.)on Monday (主北美)在星期一 I'll ring you Monday. 我星期一打电话给你。 ■(Mondays)on Mondays; each Monday 每星期一 the restaurant is closed Mondays. 此饭店星期一不营业。
语源
Old English Mōnandæg 'day of the moon', translation of late Latin lunae dies; compare with Dutch maandag and German Montag