S: (n) day (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"
S: (n) day (a day assigned to a particular purpose or observance) "Mother's Day"
S: (n) day, daytime, daylight (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"
S: (n) day (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"
S: (n) day (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"
S: (n) day (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?"
S: (n) sidereal day, day (the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day)
S: (n) day (a period of opportunity) "he deserves his day in court"; "every dog has his day"