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.

Pyrite, sometimes called "fool's gold" because of its metallic shine, is an iron sulfide mineral commonly found in sedimentary environments.

From Science Daily • Apr. 16, 2026

Trying to assign an exact reason to Bitcoin’s collapse can be a fool’s errand, but one risk increasingly cited by short sellers is the rise of quantum computing, S3 said.

From Barron's • Feb. 10, 2026

The numbers: The trade deficit fell a few months ago to a 16-year low, but it was fool’s gold.

From MarketWatch • Jan. 29, 2026

Trying to explain journalistic ethics to a lifelong criminal was probably a fool’s errand, but I still tried.

From Slate • Dec. 1, 2025

Yet his fool's face left no doubt of who he was.

From "A Clash of Kings" by George R.R. Martin