Meaning

• Any period of 24 hours.

  "I've been here for two days and a bit."

• A period from midnight to the following midnight.

  "The day begins at midnight."

• Rotational period of a planet (especially Earth).

  "A day on Mars is slightly over 24 hours."

• 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;  I work at night and sleep during the day."

• A specified time or period; time, considered with reference to the existence or prominence of a person or thing; age; time.

  "Every dog has its day."

• A period of contention of a day or less.

  "The day belonged to the Allies."

• A 24-hour period beginning at 6am or sunrise.

  "Your 8am forecast: The high for the day will be 30 and the low, before dawn, will be 10."

Meaning

• To spend a day (in a place).