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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.

As a rule of thumb, every $10 rise in oil adds about five cents per pound to polyethylene, according to Morales.

From Barron's • May 12, 2026

There’s no real rule of thumb for this, other than that it’s always best to keep your immediate cash needs liquid in a high-yield savings account or money-market account.

From MarketWatch • May 11, 2026

A common rule of thumb for builder investors is buy the stocks when they trade at one-times book value and sell at two-times book value.

From Barron's • Apr. 12, 2026

“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

This looks to us like a principle, maxim, or rule of thumb, not a law, because it lacks specificity.

From "The Invention of Science" by David Wootton




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