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brightline

American  
[brahyt-lahyn] / ˈbraɪtˌlaɪn /
Or bright-line

adjective

  1. (of rules, standards, etc.) unambiguously clear.

    This muddies the waters of what should be a brightline rule.

noun

  1. Physical Chemistry. brightline spectrum.

Etymology

Origin of brightline

bright + line 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

No bill ever came out of that group, but it would likely include net neutrality’s three brightline rules: no throttling, blocking, or paid prioritization of web traffic.

From The Verge • Mar. 9, 2021

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.