rule of thumb

noun phrase

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

Examples of rule of thumb in a Sentence

Recent Examples on the Web
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As a rule of thumb, the shorter the sequence or read of base pairs, the older the DNA, Meyer-Kaiser said. Katie Hunt, CNN Money, 7 Nov. 2025 Hang Art at Different Levels When hanging a piece of art above your desk, a good rule of thumb is to hang it about 8-10 inches above its surface. Tessa Cooper, Better Homes & Gardens, 6 Nov. 2025 For many years, the rule of thumb was that working hard will guarantee some level of success. Eleanor Pringle, Fortune, 6 Nov. 2025 How to Do a Self Breast Exam Weiss’s rule of thumb? Anisa Arsenault, Health, 24 Oct. 2025 See All Example Sentences for rule of thumb

Word History

First Known Use

circa 1658, in the meaning defined at sense 1

Time Traveler
The first known use of rule of thumb was circa 1658

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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 11 Nov. 2025.

Kids Definition

rule of thumb

1
: a method based on experience and common sense
2
: a general principle that is roughly correct
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