1. 24-hour interval, day, mean solar day, solar day, twenty-four hour period, twenty-four hours

time for Earth to make a complete rotation on its axis

Example Sentences:
'two days later they left'
'they put on two performances every day'
'there are 30,000 passengers per day'

• 24-hour interval
• mean solar day
• solar day
• twenty-four hour period
• twenty-four hours

2. day

some point or period in time

Example Sentences:
'it should arrive any day now'
'after that day she never trusted him again'
'those were the days'
'these days it is not unusual'

3. day

a day assigned to a particular purpose or observance

Example Sentences:
'Mother's Day'

4. day, daylight, daytime

the time after sunrise and before sunset while it is light outside

Example Sentences:
'the dawn turned night into day'
'it is easier to make the repairs in the daytime'

• daylight
• daytime

5. day

the recurring hours when you are not sleeping (especially those when you are working)

Example Sentences:
'my day began early this morning'
'it was a busy day on the stock exchange'
'she called it a day and went to bed'

6. day

an era of existence or influence

Example Sentences:
'in the day of the dinosaurs'
'in the days of the Roman Empire'
'in the days of sailing ships'
'he was a successful pianist in his day'

7. day

the period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis

Example Sentences:
'how long is a day on Jupiter?'

8. day, sidereal day

the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day

• sidereal day

9. day

a period of opportunity

Example Sentences:
'he deserves his day in court'
'every dog has his day'

10. clarence day, clarence shepard day jr., day

United States writer best known for his autobiographical works (1874-1935)

• clarence day
• clarence shepard day jr.