I would like to know the meaning of "we should not roam about in the hot sun".
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It's not an idiom. It's just a sentence, meaning: We shouldn't run around outside, because it's very sunny and hot. Obviously running around outside is not a good idea if it's very warm, because you'll get hot and dehydrated, and possibly sunburned. |
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Among its many meanings, about can express location in a general area. So the example sentence can be "translated" as:
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I don't think it's an idiom. I think it's just a sample sentence.
about is used in this sense
Comparable to using around. |
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Among its meanings, about, as an adverb (NB: It's also a preposition), has the following ones (NOAD):
Or the OALD that says "nearly; very close to". EDIT: But as Martha correctly pointed out, here we have a different meaning. |
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