LORD'S DAY

This expression is found only one time in the N.T. While on the island of Patmos, the apostle John was "in the spirit on the Lord's day" (Rev. 1:10). But the adjective, kuriakos, "the Lord's," is also used of the communion supper (1 Cor. 11:20). The term means "belonging to the Lord." The writers of the post-apostolic age spoke of Sunday as "the Lord's day." For example, a document, known as the Didache, states: " come together each Lord's day of the Lord, break bread, and give thanks" (14). Revelation 1:10 is an obvious reference to the FIRST DAY OF THE WEEK (see).
Adapted from the book "Bible Words and Theological Terms Made Easy" by Wayne Jackson