bright line

noun

A clear distinction in the context of a legal, moral, ethical, or analytical judgment.

“In these situations, there is no bright line between aggressive play and outright cheating.”

Opposite
fine linegray area
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Meanings

nounbright line (plural bright lines)

plural bright lines

  1. idiomaticA clear distinction in the context of a legal, moral, ethical, or analytical judgment.

    In these situations, there is no bright line between aggressive play and outright cheating.

    Antonyms: fine line, gray area

Synonyms & antonyms

nounA clear distinction in the context of a legal, moral, ethical, or analytical judgment.

Opposite
fine linegray area
Cite this entry
APA

bright line. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/bright%20line

MLA

“bright line.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/bright%20line. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “bright line,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/bright%20line.

Source: bright line on Wiktionary, CC BY-SA 4.0.