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Definition of "infallible" []

  • Incapable of erring: an infallible guide; an infallible source of information. (adjective)
  • Incapable of failing; certain: an infallible antidote; an infallible rule. (adjective)
  • Roman Catholic Church Incapable of error in expounding doctrine on faith or morals. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "infallible" in a sentence
  • "The only infallibility they have is that which they define as infallible eg. “oops, a bug!”"
  • "They look at Superbowl Guy like he was a superstitious "ex" Nazi, somewhere to the right of Attila The Hun, who preaches discrimination against gays and women, believes himself to be infallible, is a firm roadblock to social progress, dictates policies that ensures the spread of AIDS, dresses like an overly-rich drag queen with no taste, and devotes his time to protecting child molesters around the globe?"
  • "He has to make a quick visit to Dr. Hervey, a leprosy specialist who has developed a certain infallible test ..."