from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Good faith; sincerity.
  • n. Information that serves to guarantee a person's good faith, standing, and reputation; authentic credentials: "Sakharov's bona fides within the Soviet system . . . have given added weight to his message” ( Christian Science Monitor).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. sincerity, good faith
  • n. credentials that authenticate a person's standing or reputation

from the GNU version of the Collaborative International Dictionary of English

  • Good faith; honesty; freedom from fraud or deception.

from The Century Dictionary and Cyclopedia

  • n. Good faith; fair dealing. See bona fide.


Latin bona fidēs, good faith : bona, feminine of bonus, good + fidēs, faith.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin bona, nominative feminine singular of bonus ("good"), + fidēs ("faith"). (Wiktionary)


Sorry, no example sentences found.


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  • The term "bona fides" (L. bɒnā fĭdēs = good faith or trust) is singular. The plural of this term is bonae fides.
    The plural of "bona fide" (ablative case of a fem. 5th declension noun), which literally means "with good faith," is "bonis fidebus." See bona fide.

    December 4, 2011