Pronunciation: (dā), [key]
1. the interval of light between two successive nights; the time between sunrise and sunset: Since there was no artificial illumination, all activities had to be carried on during the day.
2. the light of day; daylight: The owl sleeps by day and feeds by night.
3. Astron.
a. Also called mean solar day. a division of time equal to 24 hours and representing the average length of the period during which the earth makes one rotation on its axis.
b. Also called solar day. a division of time equal to the time elapsed between two consecutive returns of the same terrestrial meridian to the sun.
c. Also called civil day. a division of time equal to 24 hours but reckoned from one midnight to the next. Cf. lunar day, sidereal day.
4. an analogous division of time for a planet other than the earth: the Martian day.
5. the portion of a day allotted to work: an eight-hour day.
6. a day on which something occurs: the day we met.
7. (often cap.) a day assigned to a particular purpose or observance: New Year's Day.
8. a time considered as propitious or opportune: His day will come.
9. a day of contest or the contest itself: to win the day.
10. Often, days. a particular time or period: the present day; in days of old.
11. Usually, days. period of life or activity: His days are numbered.
12. period of existence, power, or influence: in the day of the dinosaurs.
13. light1 (def. 19a).
14. call it a day, to stop one's activity for the day or for the present; quit temporarily: After rewriting the paper, she decided to call it a day.
15. day in, day out, every day without fail; regularly: They endured the noise and dirt of the city day in, day out. Also,day in and day out.


Pronunciation: (dā), [key]
1. Clarence (Shep•ard) Pronunciation: (shep'urd), [key] 1874–1935, U.S. author.
2. Dorothy, 1897–1980, U.S. Roman Catholic social activist, journalist, and publisher.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

See also:
  • day (Thesaurus)
  • day (Encyclopedia)

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