영역이라는 뜻이죠 ^^
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유사어로는 region, area, territory 가 있습니다.
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아래는 롱맨에 나온 사전적 정의입니다.
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*domain
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noun [countable] formal
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1 ACTIVITY/KNOWLEDGE an area of activity, interest, or knowledge: This problem lies outside the domain of medical science.
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2 sb/sth's domain an area of activity controlled by someone: Mortgages were until recently the domain of building societies.
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3 the part of an Internet address that shows a particular organization or website
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4 LAND an area of land owned and controlled by one person or government: feudal domains
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5 in the public domain if information is in the public domain, it is not kept secret: Details of the arms deals must be brought into the public domain.
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6 QUANTITIES technical the set of possible quantities by which something can vary
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