Definition:

To mean something or someone is genuine, authentic, or legal.

In business and law, bona fide implies sincerity and earnestness in the absence of fraud.

Etymology: Bona fide comes from the Latin language and translates to “good faith.” As the word moved into English, it maintained most of its meaning and is still used to describe honest intents and authenticity. 

In a Sentence

The chairman of the school board is also a bona fide member of the Anti-corruption commission.

In good faith or without the intention to deceive

The term can apply to promises to mean they have been made in pure intention. A bona fide marriage proposal implies that the suitor is serious and does not intend to be dishonorable.