involving no risk or harm, even when tampered with.
never-failing: a foolproof method.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use foolproof in a sentence
Experts worry that members of the public may use the results from such tests as tacit permission to disregard precautions such as wearing masks or maintaining distance from others — even though the tests are not foolproof.How do home tests for coronavirus work? Where can I get one? | William Wan | December 17, 2020 | Washington Post
There isn’t a foolproof solution, but a tight fit along your cheeks and nose will help a lot.
In air transportation, the largest and most modern jets are becoming almost foolproof, with the pilots in command for less and less of any given flight.
While there’s no single foolproof way of detecting life, Lingam says, considering multiple lines of evidence would reduce the chance of a false alarm.Three ways scientists could search for life on Venus | Charlie Wood | October 1, 2020 | Popular-Science
The most foolproof option, however, is to fill out and return the ballot as soon as it arrives.Five key science takeaways from the first presidential debate | Purbita Saha | September 30, 2020 | Popular-Science
A “foolproof” way to make the diagnosis would be news indeed!
Geo-location services of this sort do not have absolutely foolproof accuracy.Hook-Ups, Porn Habits, and Lesbian Fantasies: Iraqis' Sexy Whispers | Gideon Resnick | August 8, 2014 | THE DAILY BEAST
Cry No More Every parent tires of hearing their child cry, but not everyone finds such a foolproof way to make it stop.North West Debuts, Rob Ford Arm-Wrestles Hulk Hogan & More Viral Videos | The Daily Beast Video | August 24, 2013 | THE DAILY BEAST
Of all the potential holiday gifts, few are as foolproof as cash or gift cards.
Dan Gross on why the episode is a reminder that the vaunted cloud is much like the Web in the 1990s—young and far from foolproof.Blame It on the Cloud: Amazon Outage Shows Peril of Outsourcing Data | Daniel Gross | October 25, 2012 | THE DAILY BEAST
It was a nearly foolproof way to make sure that you could talk to the people you trusted, but that no one else could listen in.Little Brother | Cory Doctorow
Five hours to devise one more completely foolproof method of bringing about the eventual ruin of the association.Gone Fishing | James H. Schmitz
He tried to figure out some foolproof way of cabling to Havana, but the censorship hazards were too great.The Five Arrows | Allan Chase
There are a few sequences of words that really are foolproof, carrying their own atmosphere and dignity with them.The Book of Susan | Lee Wilson Dodd
With the finest pen he traced the curlicues an engraving lathe had evolved to make the passes foolproof.The Syndic | C.M. Kornbluth
British Dictionary definitions for foolproof
proof against failure; infallible: a foolproof idea
(esp of machines) proof against human misuse, error, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012