<p><strong>Noun</strong></p><ul><li>the interval of light between two successive nights; the time between sunrise and sunset.</li><li>the light of day; daylight.</li><li>Astronomy: a division of time equal to 24 hours and representing the average length of the period during which the earth makes one rotation on its axis.</li><li>a division of time equal to the time elapsed between two consecutive returns of the same terrestrial meridian to the sun.</li><li>a division of time equal to 24 hours but reckoned from one midnight to the next.</li><li>the portion of a day allotted to work: an eight-hour day.</li><li>a day on which something occurs: the day we met.</li><li>a day assigned to a particular purpose or observance: New Year's Day.</li><li>a time considered as propitious or opportune: His day will come.</li><li>a day of contest or the contest itself: to win the day.</li><li>a particular time or period: the present day; in days of old.</li><li>period of life or activity: His days are numbered.</li><li>period of existence, power, or influence: in the day of the dinosaurs.</li></ul>