Englishfor English speakers
demonstration
Noun
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A demonstration of something is the act of showing that it is true or that it exists.
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A demonstration of something is the act of showing how to do it or use it.
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A demonstration is a gathering of people to protest something publicly.
hall
Noun
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A hall is a large space with a roof and walls. It can be a kind of large building, or a room or part of a building. Most commonly, it is the area just inside the front door.
Please leave your boots in the front hall.