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Definitions

rule of thumb

NOUN
informal guiding principle
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“A very simple rule of thumb for tactical liquidation is when gold and equities crash together, which usually signals margin call / liquidation-esque behavior,” they say.

From MarketWatch • Mar. 20, 2026

As a general rule of thumb: where eyeballs go, advertisers follow.

From The Wall Street Journal • Mar. 10, 2026

“My usual rule of thumb is, move the decimal point one place to the left,” Matheson said.

From Los Angeles Times • Feb. 24, 2026

One rule of thumb Everstine has is that "if the price seems too good to be true, that should be a red flag".

From BBC • Feb. 9, 2026

Restricting the computers from joining the editorial meetings wasn’t a rule: it was a rule of thumb.

From "Hidden Figures" by Margot Lee Shetterly