WordReference Random House Unabridged Dictionary of American English © 2025
all-day
(ôl′dā′),USA pronunciation adj.
- taking up, extending through, lasting for, or occurring continually during a day, esp. the hours of daylight;
daylong:an all-day tour of the city; an all-day lollipop.Cf. all-night.
- 1865–70
'all-day' also found in these entries (note: many are not synonyms or translations):