DictionarydayCalendar period
noun

day

DAY/deɪ/

The daily period defined by Earth's rotation.

Bright sunlight fills the town's quiet streets during the day.

A quiet town under bright daytime sky, sunlight illuminates everyday street and long open view.
Etymology

Old English dæg originally named the hours when the sun was above the horizon. Its meaning expanded to include the full 24-hour period, giving day its two familiar senses.

In context

Vlad Savchuk4:30
… In the biblical times, a day began at sunset. So in Genesis :5, it says evening and morning were the first day.
So You Want to Start a Fast…

More examples

  • The package arrives in three days.
  • These flowers open during the day and close at night.
  • My work day ends at five.
  • Grandma often talks about her days as a teacher.

Forms

day · days

daily adjective — Happening or done every day.

Similar words

date
Identifies a particular calendar day rather than its duration.
daytime
Refers only to the light hours, not the full calendar period.