Day Definition

days
noun
days
The period of light between sunrise and sunset.
Webster's New World
Daylight.
Webster's New World
The 24-hour period (mean solar day) that it takes the earth to rotate once on its axis with respect to the sun: the civil or legal day is from midnight to midnight, the astronomical day from noon to noon.
Webster's New World
Sunshine.
Webster's New World
The time that it takes any celestial body to revolve once on its axis.
Webster's New World
Synonyms:
Antonyms:
adjective
Of or relating to the day.
American Heritage
Working during the day.
The day nurse.
American Heritage
Occurring before nightfall.
A day hike.
American Heritage
Synonyms:
pronoun

A patronymic surname​ derived from a medieval diminutive of David.

Wiktionary

An English surname​ from day as a word for a "day-servant", an archaic term for a day-laborer. ,or from given names such as Dagr, Daug, Dege, and Dey, cognate with Scandinavian Dag.

Wiktionary

An Irish surname​ anglicised from Ó Deághaidh (“descendant of a person named Good Luck”).

Wiktionary

A Mbum-Day language of Chad.

Wiktionary
idiom
day after day
  • For many days; continuously.
American Heritage
day in, day out
  • Every day without fail; continuously.
American Heritage
one day
  • Someday.
American Heritage
one of these days
  • Someday.
American Heritage
one of those days
  • A difficult or trying day.
American Heritage

Other Word Forms of Day

Noun

Singular:
day
Plural:
days

Origin of Day

  • This surname has multiple origins. Besides the ones listed below, Norman origin has also been suggested from De Haie", or "a corruption of the Normandy French D'Ossone, from the town of Ossone, in Normandy".

    From Wiktionary

  • Middle English dai, day from Old English dæg agh- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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