From Middle English day, from Old English dæġ (“day”), from Proto-West Germanic *dag, from Proto-Germanic *dagaz (“day”).
day (plural days)
- A period of 24 hours.
- The period from midnight to the following midnight. There are 7 days in a week: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday.
- Rotational period of a planet (especially earth).
- The part of a day period which one spends at one’s job, school, etc.
- I worked two days last week.
- Part of a day period between sunrise and sunset where one enjoys daylight, daytime.
- day and night.
- A specified time or period; time, considered with reference to the existence or prominence of a person or thing; age; time; era.
- every dog has its day; back in the day; in those days
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