day
n.-
1 24-hour period (n.) A1 Beginnera period of 24 hours, usually starting from midnight.
a standard unit of time representing one full rotation of the Earth, conventionally measured from midnight to midnight.
ExampleThere are seven days in a week and 365 days in a year.
ExampleThe contract stipulates that the goods must be delivered within ten working days of the initial purchase order.
- twenty four hours
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2 daylight hours (n.) A1 Beginnerthe time between when the sun rises and when it sets.
the period of light between dawn and nightfall; the diurnal portion of the 24-hour cycle.
ExampleThe days are much longer in the summer than in the winter.
ExampleAs the winter solstice approached, the days grew noticeably shorter, leaving the villagers with only a few hours of usable light.
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3 work or school hours (n.) A2 Elementarythe part of the day that you spend at your job or at school.
the portion of a day dedicated to a specific activity, typically professional labor or education.
ExampleI had a very busy day at the office and I am tired now.
ExampleAfter a grueling day on the assembly line, the workers were eager to return home and rest before the next shift began.
- shift
- working hours
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4 a specific era (n.) B1 Intermediatea particular time in history or in someone's life.
a specific period or era, often characterized by the prominence of a person, movement, or technology.
ExampleIn my grandfather's day, people didn't have mobile phones.
ExampleThe historian argued that the glory days of the empire were already fading by the time the new emperor took the throne.
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5 planetary rotation (n.) B2 Upper Intermediate Technical Sciencethe time it takes for a planet to turn around once.
the duration of one complete rotation of a celestial body on its axis.
ExampleA day on Mars is slightly longer than a day on Earth.
ExampleVenus is unique in our solar system because its sidereal day is actually longer than its orbital year.
- rotational period