Englishfor English speakers
knowledge
Noun
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Knowledge is information that you know.
He shared his knowledge with you.
day
Noun
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A day is a measure of time.
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24 hours
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Seven days make one week
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The time between midnight and the following midnight (or between sunset and sunset in Jewish reckoning)
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The time between sunrise and sunset, when it is daylight
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The part of a day spent at work or school
He spent two days at work means that on two days he went to work; he did not spend 48 hours at work.