Englishfor English speakers
deviation
Noun
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A deviation is difference or movement away from a standard.
They insist that there must be no deviation from that style.
Any deviations from the contract would have to be agreed by both parties.
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A deviation is the difference between a number and the average of a set of values.
beacon
Noun
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A beacon is used to give notices; usually warnings.
If the beacon lights up, it means that enemies are approaching.
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A beacon is an electronic device that broadcast signals.