day

Definitions

1. noun

   A period of 24 hours.

   Examples

   • I have been here for two days.
   • A day has twenty-four hours.
   ≈twenty-four hour day≈24-hour day≈nychthemeron
2. noun

   The time when the sun is up and it is light outside.

   Examples

   • I work at night and sleep during the day.
   • It was a warm, sunny day.
   ≈daylight≈day≈daylight≈daylength≈daytime +8 more
3. noun

   The hours of a day that you spend at work or school.

   Examples

   • I worked two days last week.
   • She has a long day at school tomorrow.
4. noun

   A special day, such as a holiday or a yearly celebration.

   Examples

   • Christmas Day is on December 25.
   • Many countries have a Remembrance Day.
5. noun

   A period of time in history or in someone's life.

   Examples

   • In those days, people wrote many letters.
   • Back in the day, we played outside all afternoon.
   ≈era≈epoch≈age≈cycle≈day +8 more
6. noun

   The period from one midnight to the next midnight, as counted on a calendar.

   Examples

   • The day begins at midnight.
   • Monday is the first day of the week in many countries.
7. noun

   A period of 24 hours that starts in the morning, usually at sunrise.

   Examples

   • The high for the day will be thirty degrees.
   • The weather report gives highs and lows for the coming day.
8. noun

   The time a planet takes to turn around once.

   Examples

   • A day on Mars is a little over 24 hours.
   • A day on Venus is longer than its year.
9. noun

   The time from one noon to the next, when the sun is at the same place in the sky.

   Examples

   • A solar day on Earth is just over 24 hours.
   • A solar day on Mercury is very long.
   ≈twenty-four hour day≈24-hour day≈nychthemeron
10. noun

    The time the Earth takes to turn once compared with the stars.

    Examples

    • A sidereal day is about four minutes shorter than a solar day.
    • Astronomers use the sidereal day to track stars.
    ≈twenty-four hour day≈24-hour day≈nychthemeron