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.
The rule of thumb is that if you are tempted to drink alcohol, drink a non-alcoholic beverage instead. Lance Eliot, Forbes, 3 Jan. 2025 Normal travel time rules of thumb go out the window; a distance of about 100-125 miles (160-200 km) can easily take six or seven hours. New Atlas, 24 Dec. 2024 The basic rule of thumb to follow is a quart of water for each inch of the trunk's diameter. Ashlyn Needham, Southern Living, 14 Dec. 2024 Here are a few tips from experts to get your trees to sparkle with lights: A good rule of thumb for decorating these trees is to start wrapping lights at the very bottom of the tree to ensure an extension cord can be plugged in at the ground of the tree, where nobody will see it. Zach Bradshaw, The Arizona Republic, 26 Nov. 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 15 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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