Added 9 October 2026 sunday noun Categories: TimePeopleEveryday Words noun ! Definition from WordNet 3.1, Princeton University. More about sunday at Wordnik → Where our words come from → First day of the week; observed as a day of rest and worship by most Christians. United States evangelist (1862-1935). Related Words: sunday-go-to-meetinggoodbestsungo-to-meetingmondayfridaytuesdaywednesdaythursdaysaturdayweekend Back to today's word