only once, in Revelation 1:10 , was in the early Christian ages used to denote the first day of the week, which commemorated the Lord's resurrection. There is every reason to conclude that John thus used the name. (See SABBATH .)
M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition,
published by Thomas Nelson, 1897. Public Domain, copy freely.
[N] indicates this entry was also found in Nave's Topical Bible
Bibliography InformationEaston, Matthew George. "Entry for Lords day". "Easton's Bible Dictionary".