infallible
adjective
Did you know?
Watch out when you hear about infallible predictions, an infallible plan, an infallible cure, or even infallible lip gloss. Infallible isn't a claim that scientists, engineers, and doctors like to make, so you're probably getting better information when the word not comes first. You may have heard the phrase "papal infallibility", which refers to the official position of the Roman Catholic church, adopted in the 19th century, that certain solemn statements made by a Pope about faith or morals were not to be questioned. Popes since then have been careful not to make many of these statements.
Examples of infallible in a Sentence
Judith Martin, Mercury News, 2 Oct. 2025
While mobile boarding passes are a convenient and accessible way to have one of your most important travel documents at the ready, technology isn’t infallible.
—Merrell Readman, Travel + Leisure, 14 Sep. 2025
The Supreme Court and its judges are not infallible or above criticism.
—Adriana Carranca, Time, 12 Sep. 2025
Accuracy, Bias, and Human Oversight Matter Biometric systems aren’t infallible.
—Alonzo Martinez, Forbes.com, 29 Aug. 2025
See All Example Sentences for infallible
Cite this Entry
“Infallible.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infallible. Accessed 31 Oct. 2025.
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infallible
adjective
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