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.
That’s a sizeable increase, and would cover up nearly 30 feet of beach, using a standard rule of thumb. Ian Dexter Palmer, Forbes.com, 4 Aug. 2025 The rule of thumb is to read the room and set your volume accordingly. Jessica Kozuka, Travel + Leisure, 2 Aug. 2025 An easy rule of thumb is to simply think Greek… as in Greek yogurt. Margaux Anbouba, Vogue, 23 July 2025 With that said, there are, as with many rules of thumb, some exceptions. Beth Ann Mayer, Parents, 23 July 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 19 Aug. 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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