On average, this is 24 hours (86,400 seconds). As a day passes at a given location it experiences morning, afternoon, evening, and night. This daily cycle drives circadian rhythms in many organisms, which are vital to many life processes.

Understanding the Context

The meaning of DAY is the time of light between one night and the next. How to use day in a sentence. DAY definition: 1. a period of 24 hours, especially from twelve o'clock one night to twelve o'clock the next night….

Key Insights

Learn more. Find today's national days, explore what's coming up this week, and never miss a fun holiday again. Details about today's date with count of days, weeks, and months, Sun and Moon cycles, Zodiac signs and holidays. A day is a 24-hour period, or the length of time it takes the Earth to rotate fully on its axis. On This Day In History: anniversaries, birthdays, major events, and time capsules.

Final Thoughts

This day's facts in the arts, politics, and sciences. Definition of day noun from the Oxford Advanced Learner's Dictionary. [countable] a period of 24 hours. ‘What day is it today?’ ‘Monday.’. I go to the gym every day. We spent five days in Paris.

I saw Tom three days ago. We're going away in a few days. The house should be ready in a few days' time. day noun - Definition, pictures, pronunciation and usage notes | Oxford ...