rule of thumb

noun phrase

Definition of rule of thumb

1 : a method of procedure based on experience and common sense
2 : a general principle regarded as roughly correct but not intended to be scientifically accurate

First Known Use of rule of thumb

circa 1658, in the meaning defined at sense 1

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Time Traveler for rule of thumb

Time Traveler

The first known use of rule of thumb was circa 1658

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Dictionary Entries Near rule of thumb

rule of three

rule of thumb

rule of two and three

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Cite this Entry

“Rule of thumb.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rule%20of%20thumb. Accessed 18 Sep. 2021.

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