infallible

[ in-fal-uh-buhl ]

/ ɪnˈfæl ə bəl /

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See synonyms for: infallible / infallibility / infallibly on Thesaurus.com

adjective

absolutely trustworthy or sure: an infallible rule.

unfailing in effectiveness or operation; certain: an infallible remedy.

not fallible; exempt from liability to error, as persons, their judgment, or pronouncements: an infallible principle.

Roman Catholic Church. immune from fallacy or liability to error in expounding matters of faith or morals by virtue of the promise made by Christ to the Church.

noun

an infallible person or thing.

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His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of infallible

First recorded in 1375–1425; late Middle English word from Medieval Latin word infallibilis.See in-³, fallible

synonym study for infallible

1, 2. See reliable.

OTHER WORDS FROM infallible

in·fal·li·bil·i·ty, in·fal·li·ble·ness, nounin·fal·li·bly, adverbnon·in·fal·li·ble, adjectivenon·in·fal·li·bly, adverb

Words nearby infallible

inf, in fact, infallibilism, infallibility, infallibility, papal, infallible, infamize, infamous, infamy, infancy, infant

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use infallible in a sentence

Trailing has been far more effective for Boston than switching in the Finals, yet it isn’t infallible.
Steph Curry Is Cutting Through The Noise|Louis Zatzman|June 16, 2022|FiveThirtyEight
The work is a reminder that no matter how elegant or infallible mathematics may seem, it’s still a human endeavor.
Take an online journey through the history of math|Erin Wayman|January 18, 2022|Science News
Their men on horseback — Theodore Roosevelt, Grant, even Washington — were not regarded as infallible.
Our constitutional crisis is already here|Robert Kagan|September 23, 2021|Washington Post
Even if he is, though, the pope may be infallible, but he is not omnipotent.
Is Pope Francis Backpedaling on Gays?|Jay Michaelson|November 19, 2014|DAILY BEAST

Besides Diamond, some of the Saved By the Bell characters are portrayed as infallible angels.
How Bad Was 'The Unauthorized Saved By the Bell Story'?|Kevin Fallon|September 2, 2014|DAILY BEAST
As long as they believed Saraswati was infallible, any dissatisfaction they experienced was a personal shortcoming.
The Fugitive Guru|Ben Crair|June 21, 2011|DAILY BEAST
Buffett is not infallible and his hiding in the bunker does not make him appear stronger, wiser, or accountable.
What Warren Buffett Needs to Do Now|Jeffrey Sonnenfeld|April 1, 2011|DAILY BEAST
To the vast majority of the devout, Pope Benedict XVI is infallible and the church has done nothing wrong.
The Pope's Enablers|Barbie Latza Nadeau|April 12, 2010|DAILY BEAST
"Doa Estefania, have no fear; you possess an infallible preservative," exclaimed the cappellan.
Blackwood's Edinburgh Magazine, Volume 60, No. 372, October 1846|Various
When Dan put his tobacco back unbitten, it was always an infallible sign that something had gone in a way that did not suit him.
The Courier of the Ozarks|Byron A. Dunn
An infallible method of remembering proper names is Get the name when introduced.
Assimilative Memory|Marcus Dwight Larrowe (AKA Prof. A. Loisette)
But Ramona saw now, with infallible intuition, that even as she had loved Alessandro, so Felipe loved her.
Ramona|Helen Hunt Jackson
This may be said to be an infallible rule, and an examination of the instruments of the most celebrated makers fully confirms it.
Violins and Violin Makers|Joseph Pearce

British Dictionary definitions for infallible

infallible

/ (ɪnˈfæləbəl) /

adjective

not fallible; not liable to error

not liable to failure; certain; surean infallible cure

completely dependable or trustworthy

noun

a person or thing that is incapable of error or failure

Derived forms of infallible

infallibility or infallibleness, nouninfallibly, adverb

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

infallible

Origin of infallible

synonym study for infallible

OTHER WORDS FROM infallible

Words nearby infallible

Words related to infallible

How to use infallible in a sentence

British Dictionary definitions for infallible

Derived forms of infallible