Merriam-Webster Online Dictionary
day (noun)1.
a) the time of light between one night and the next
b) - daylight
c) - daytime
2.
the period of rotation of a planet (as earth) or a moon on its axis
3.
the mean solar day of 24 hours beginning at mean midnight
4.
a specified day or date
5.
a specified time or period - age in grandfather's day often used in plural the old days the days of sailing ships
6.
the conflict or contention of the day - played hard and won the day
7.
the time established by usage or law for work, school, or business
Clarence Shepard, Jr. 1874–1935 Am. author
Thomas 1748–1789 Eng. author
William Rufus 1849–1923 Am. statesman & jurist
Merriam-Webster Online Thesaurus
day (noun)1.
the hours of light between one night and the next
SYNONIMS:
daylight, daytimeRELATED WORDS:
light, sunlight, sunshine; dawn, dawning, daybreak, forenoon, morn, morning, sunrise; afternoon, noon; dusk, eve, evening, gloaming, nightfall, sundown, sunset, twilightNEAR ANTONYMS:
black, blackness, dark, darkness2.
an extent of time associated with a particular person or thing
SYNONIMS:
day, epoch, era, period, timeRELATED WORDS:
cycle, generation, year; bit, space, span, spell, stretch, while; date, vintage3.
the first appearance of light in the morning or the time of its appearance
SYNONIMS:
aurora, cockcrow, dawning, day, daybreak, daylight, light, morn, morning, sun, sunrise, sunupRELATED WORDS:
daytime; forenoonNEAR ANTONYMS:
dark, darkness, midnight, night, nighttime; afternoon, midday; dusk, evening, eventide, gloaming, twilight