This is the 93rd most frequent Serbian word.
она
"Она" means "she" or "that" (feminine) in English.
Here, 'она' is used as a third person singular feminine pronoun used for referring to a specific female subject.
Она је дошла на време.
She arrived on time.
Here, 'она' is used as a demonstrative pronoun meaning 'that,' describing a specific book at a distance from the speaker.
Она књига је веома занимљива.
That book is very interesting.
Here, 'онај' is a base form, and 'она' could mistakenly seem relevant, but it's essential to differentiate the forms; in this case 'она' isn't directly used, but explaining this context helps with understanding.