When the sun is lighting up the sky outside, it's daytime. Most adults are at work during the daytime and come home at nighttime.

While daytime is defined as "after sunrise and before sunset," it describes this time of day even on dark, gray, days, or in parts of the world that get limited sunlight during the winter. A more accurate way to think of daytime is the hours after you wake up in the morning and before you start to think about going to bed at night. When it's daytime where you are, it's nighttime on the opposite hemisphere of the Earth.

Definitions of daytime
  1. noun
    the time after sunrise and before sunset while it is light outside
    “it is easier to make the repairs in the daytime
    synonyms: day, daylight
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    dark, night, nighttime
    the time after sunset and before sunrise while it is dark outside
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    the part of the day between noon and evening
    the middle part of the afternoon
    eve, even, evening, eventide
    the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)
    guest night
    an evening when members of a club or college can bring their friends as guests
    type of:
    period, period of time, time period
    an amount of time
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