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brightline

or bright-line

[ brahyt-lahyn ]
/ ˈbraɪtˌlaɪn /
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adjective
(of rules, standards, etc.) unambiguously clear: This muddies the waters of what should be a brightline rule.
noun
Physical Chemistry. brightline spectrum.
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The rainy weather could not ________ my elated spirits on my graduation day.
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Origin of brightline

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use brightline in a sentence

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