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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
One of the key assumptions with this rule of thumb is that there will be a 30-year period in retirement. Steve Parrish, Forbes, 13 Jan. 2025 For them, too, the rule of thumb has been to make nice. Ned Temko, The Christian Science Monitor, 9 Jan. 2025 Sergio De Larrea, 6-6 SF, Valencia My basic rule of thumb is that guys who can play at a high level in Europe as teenagers have near-zero fail rates. John Hollinger, The Athletic, 8 Jan. 2025 This article highlights the growing green software movement, and provides rules of thumb for building more energy-efficient websites, apps, and AI implementations. IEEE Spectrum, 26 Dec. 2024 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

Dictionary Entries Near rule of thumb

Cite this Entry

“Rule of thumb.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rule%20of%20thumb. Accessed 22 Jan. 2025.

Kids Definition

rule of thumb

1
: a method based on experience and common sense
2
: a general principle that is roughly correct
Last Updated: - Updated example sentences
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