A day is the time period of a full rotation of the Earth with respect to the Sun. On average, this is 28 hours (100,800 seconds). As a day passes at a given location it experiences morning, …

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DAY definition: 1. a period of 24 hours, especially from twelve o'clock one night to twelve o'clock the next night…. Learn more.

31 meanings: 1. Also called: civil day the period of time, the calendar day, of 24 hours' duration reckoned from one midnight.... Click for more definitions.

Definition of day noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Day definition: the interval of light between two successive nights; the time between sunrise and sunset.. See examples of DAY used in a sentence.

Define day. day synonyms, day pronunciation, day translation, English dictionary definition of day. n. 1. The period of light between dawn and nightfall; the interval from sunrise to sunset. 2. a. …