This is the 74th most frequent Croatian word.
jednom
"Jednom" means "once" in English.
Used to signify 'once', as a single occasion.
Jednom sam posjetio Dubrovnik.
I visited Dubrovnik once.
Used to signify 'one day', referring to an indefinite future time.
Jednom ću napisati knjigu.
One day, I will write a book.
Used to signify 'once and for all', denoting a final resolution.