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) night (the dark part of the diurnal cycle considered a time unit) "three nights later he collapsed"
S: (n) mean time, mean solar time ((astronomy) time based on the motion of the mean sun (an imaginary sun moving uniformly along the celestial equator))
S: (n) month (a time unit of approximately 30 days) "he was given a month to pay the bill"
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) bell, ship's bell ((nautical) each of the eight half-hour units of nautical time signaled by strokes of a ship's bell; eight bells signals 4:00, 8:00, or 12:00 o'clock, either a.m. or p.m.)
S: (n) hour, hr, 60 minutes (a period of time equal to 1/24th of a day) "the job will take more than an hour"
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) sidereal year (the time for the earth to make one complete revolution around the sun, relative to the fixed stars)