Simple Definition of blue law

from our Learner's Dictionary

blue law

noun

plural blue laws
US : an old law that forbids people from doing certain things (such as working or selling alcohol) on Sundays

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“Blue law.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/blue%20law. Accessed 16 Apr. 2026.

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