The period of each day when the sun is shining is daylight. If you work as a lifeguard at the town pool, your job takes place during daylight.

You can use daylight and daytime interchangeably, although daylight also means "daytime light" or "the light of the sun." If you lose electricity in your house for a few days, you might have to stick to reading when there's daylight. Many public parks are only open during daylight hours. If someone scares the living daylights out of you, they terrify you — this colloquial phrase comes from an old sense of the eyes being referred to as daylights.

Definitions of daylight
  1. noun
    the time after sunrise and before sunset while it is light outside
    synonyms: day, daytime
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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
  2. noun
    light during the daytime
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    type of:
    light, visible light, visible radiation
    (physics) electromagnetic radiation that can produce a visual sensation
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