the day after Saturday and before Monday: the Christian day of worship
WordReference Random House Learner's Dictionary of American English © 2026
Sun•day /ˈsʌndeɪ, -di/USA pronunciation
n.
adj. [before a noun]
WordReference Random House Unabridged Dictionary of American English © 2026- the first day of the week, observed as the Sabbath by most Christian denominations: [proper noun]On Sunday they would go to church.[countable]We saw him two Sundays ago.
adj. [before a noun]
- of or relating to Sunday.
- used, done, or taking place only on or as if on Sundays:a Sunday matinée.
Sun•day
(sun′dā, -dē),USA pronunciation n.
adj.
Sun′day•like′, adj.
Sun•day (sun′dā, -dē),USA pronunciation n.
- Biographicalthe first day of the week, observed as the Sabbath by most Christian sects.
- a month of Sundays, an indeterminately great length of time:She hadn't taken a vacation in a month of Sundays.
adj.
- of, pertaining to, or characteristic of Sunday.
- used, done, taking place, or being as indicated only on or as if on Sundays:a Sunday matinée.
- bef. 900; Middle English sun(nen)day, Old English sunnandæg, translation of Latin diēs sōlis, itself translation of Greek hēméra hēlíou day of the sun; cognate with German Sonntag
Sun•day (sun′dā, -dē),USA pronunciation n.
- a female given name.
Collins Concise English Dictionary © HarperCollins Publishers::
'on Sunday' also found in these entries (note: many are not synonyms or translations):