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
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Another rule of thumb is that AI can make something seem to be absolutely correct, even though the response is flawed. Lance Eliot, Forbes, 22 Oct. 2024 In a conflict zone, the legal rule of thumb is that the greater the military advantage conferred by a targeted killing, the greater the permissible civilian harm. Anna Mulrine Grobe, The Christian Science Monitor, 15 Oct. 2024 According to Taylor, a good rule of thumb is to go a little darker than your natural lip color. Alyssa Brascia, People.com, 10 Oct. 2024 How to protect yourself Here are five rules of thumb to follow to avoid being duped. Megan Cerullo, CBS News, 19 Sep. 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 8 Nov. 2024.

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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