bona fides
Americannoun
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(italics) good faith; absence of fraud or deceit; the state of being exactly as claims or appearances indicate.
The bona fides of this contract is open to question.
-
(sometimes italics) the official papers, documents, or other items that prove authenticity, legitimacy, etc., as of a person or enterprise; credentials.
All our bona fides are on file with the SEC.
noun
Usage
Bona fides is from the singular Latin phrase bona fidēs , meaning “good faith,” and has the same meaning in English. But partially because its -es ending makes bona fides look and sound like a plural, it has developed the plural sense “credentials.” This plural use, although criticized by some usage guides, has been increasing in all varieties of speech and writing. The adjective bona fide (without the “s”) is from a Latin phrase meaning “in good faith, with good faith.” It was originally used adverbially in this sense, but is now mainly an adjective. The meaning “authentic, true” is a later development sometimes denounced as sloppy usage, but its use is bona fide and widespread.
Etymology
Origin of bona fides
First recorded in 1835–40; from Latin bona fidēs “good faith”
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The shah wanted to police the waterway to prove his bona fides to the West.
From The Wall Street Journal • Jun. 23, 2026
For older voters, he has Kennedy bona fides.
From Slate • Jun. 18, 2026
Oracle has been on both sides of the AI trade, with investors debating its cloud-versus-software bona fides.
From Barron's • Jun. 12, 2026
I asked Schenck whether he thought Suozzi used living at C Street to establish his bona fides with a minister known then as a right-wing evangelical.
From Salon • May 29, 2026
More groups meant more opportunities for women to get closer to the research and establish their bona fides.
From "Hidden Figures" by Margot Lee Shetterly
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
