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2017 Word of the Year

open cover

noun, Mathematics.
1.
a cover of a set consisting entirely of open sets.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for open cover
Historical Examples
  • This will be equally good the next day, if kept in a cool place, with an open cover, which prevents all danger of souring.

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6
8
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