a. Belonging to the Christian Sabbath. [ 1913 Webster ]
Sunday letter.
Sunday school.
n. [ AS. sunnandaeg; sunne, gen. sunnan, the sun + daeg day; akin to D. zondag, G. sonntag; -- so called because this day was anciently dedicated to the sun, or to its worship. See Sun, and Day. ] The first day of the week, -- consecrated among Christians to rest from secular employments, and to religious worship; the Christian Sabbath; the Lord's Day. [ 1913 Webster ]
Advent Sunday,
Low Sunday,
Passion Sunday