|part of speech:
||incapable of error.
The computer's calculation is considered infallible.You are wrong if you think you're infallible; you're bound to make a mistake one day that you'll seriously regret.
||not liable to error or failure; extremely reliable.
I will rely on your infallible judgment.The book is an infallible guide to travel in Italy.
- similar words:
||of the pope, incapable of fallacy or error in expounding Roman Catholic doctrine on faith or morals.
||immaculate, reliable, sure, true
||infallibly (adv.), infallibility (n.)