What does janna mean in Hindi?

"Janna" is not a word in Hindi. It's possible you're thinking of a different language, or there might be a slight misspelling.

Could you please provide more context or clarify what you are looking for?

For example:

* What is the full word or phrase?

* What is the context of the word? (e.g., a song, a conversation, a book)

Knowing more about your question will help me give you a more accurate answer.