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Definitions

foolproof

[fool-proof] / ˈfulˌpruf /


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.

Adding Extra Security at Home: Even your home network isn’t foolproof.

From Salon • Feb. 12, 2026

Leaders said grabbing sovereign assets would set a dangerous precedent and that a complex plan prepared by the European Union wasn’t foolproof.

From The Wall Street Journal • Dec. 19, 2025

Supporters of the birth dose say that screening efforts aren’t foolproof.

From The Wall Street Journal • Dec. 5, 2025

“Those can be defeated but that can take a lot of time,” Sutter said.”It’s not foolproof but at least it’s a strong deterrent.”

From Los Angeles Times • Nov. 26, 2025

He would have to go over his story and make it foolproof.

From "Native Son" by Richard Wright