mortal sin

American  

noun

Roman Catholic Church.

1. a willfully committed, serious transgression against the law of God, depriving the soul of divine grace.

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mortal sin British  

noun

1. Christianity a sin regarded as involving total loss of grace Compare venial sin

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Example Sentences

See Examples For:

mortal sin

“Grantchester” may be ending, but “Father Brown” endures because its homilies champion the belief that good exists in everybody, even in the hearts of those who commit mortal sin.

From Salon ● Jun. 16, 2026

That would be considered a mortal sin by the vast majority of football fandom.

From BBC ● Mar. 29, 2026

“Normally, I’m like, ‘I don’t want to do that,’” says Jackman, over Zoom from a New York hotel room, as if he’s confessing a mortal sin.

From Los Angeles Times ● Nov. 19, 2025

Most of us have been taught from a young age that failing to stretch before or after exercising is akin to a mortal sin.

From Seattle Times ● Dec. 26, 2022

“I suppose the moral is,” said Arthur, “that you must not commit mortal sin, even if twelve lives depend upon it Dogmatically speaking, I believe that is sound.”

From "The Once and Future King" by T. H. White

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