The period of time during which the Earth completes one rotation on its axis, typically measured from midnight to midnight, and divided into 24 hours. noun
There are 24 hours in a day.
She plans her activities according to the day and night cycle.
The period of light between sunrise and sunset, as opposed to night. noun
The day was sunny and warm.
During the summer, the days are longer.
A specific period of time or date, often marked by an event or activity. noun
Her wedding day was unforgettable.
We celebrate Independence Day every year.
A period of 24 hours as a unit of time, reckoned from one midnight to the next, corresponding to a rotation of the earth on its axis. noun
The package will be delivered in three days.
He works five days a week.
The time of life or period of existence; age or era. noun
In my grandfather's day, things were different.
The technology of the day was not as advanced.