From WordNet (r) 3.0 (2006):
day
n 1: time for Earth to make a complete rotation on its axis;
"two days later they left"; "they put on two performances
every day"; "there are 30,000 passengers per day" [syn:
day, twenty-four hours, twenty-four hour period,
24-hour interval, solar day, mean solar day]
2: some point or period in time; "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: a day assigned to a particular purpose or observance;
"Mother's Day"
4: the time after sunrise and before sunset while it is light
outside; "the dawn turned night into day"; "it is easier to
make the repairs in the daytime" [syn: day, daytime,
daylight] [ant: dark, night, nighttime]
5: the recurring hours when you are not sleeping (especially
those when you are working); "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: an era of existence or influence; "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: the period of time taken by a particular planet (e.g. Mars)
to make a complete rotation on its axis; "how long is a day
on Jupiter?"
8: the time for one complete rotation of the earth relative to a
particular star, about 4 minutes shorter than a mean solar
day [syn: sidereal day, day]
9: a period of opportunity; "he deserves his day in court";
"every dog has his day"
10: United States writer best known for his autobiographical
works (1874-1935) [syn: Day, Clarence Day, Clarence
Shepard Day Jr.]