[Properly, The Lords Day = L. dies Dominicus, -ca (whence F. dimanche, Sp. Domingo, It. Domenica), Gr. ἡ κυριακὴ ἡμέρα Rev. i. 10.] A Christian appellation for Sunday.
In the 1718th c. Lords day (without the article) was somewhat widely used (not exclusively among Puritans) as an ordinary name for the day. This use seems to be partially retained by some Nonconformists (expressions like next Lords day appearing occasionally in announcements of services). Otherwise, the Lords day is the only form now current, and it is commonly employed only when the intention is to refer expressly to the sacred character of the day.
c. 1175. Lamb. Hom., 41. Sunedei is ihaten þes lauerdes dei.
1398. Trevisa, Barth. De P. R., IX. xxi. (1495), 358. The fyrste day hyght the lordes day and Sonedaye.
1639. Bury Wills (Camden), 177. Vpon euery Lords day, called Sonday, throughout euery yere of the said terme.
1660. Pepys, Diary, 4 March. 4th. Lords day. Before I went to church I [etc.].
1677. Act 29 Chas. II., c. 7 § 1. For the better observation and keeping holy the Lords day commonly called Sunday.
c. 1710. C. Fiennes, Diary (1888), 301. They come in Coaches and drive round, but it is only Lords day nights and some nights.
1759. B. Fawcett, Pref. to Baxters Saints R. (1836), 42. On Lords days a person might overhear hundreds of families engaged in singing psalms.
1882. Jean L. Watson, Life R. S. Candlish, viii. 97. Multitudes were thus induced to travel on the Lords day.
attrib. 1901. Whitakers Almanack, 285. (Societies and Institutions.) Lords Day Observance Society.