This is the 232nd most frequent Serbian word.
сви
"Сви" means "everyone" or "all" in English.
Here, 'сви' (svi) is used as a pronoun meaning 'everyone' or 'all' to refer to all people in general.
Сви воле рођенданске прославе.
Everyone loves birthday celebrations.
In this sentence, 'све' (sve) is used as a form of 'сви,' referring to all of the specified group of friends.
Позвао сам све пријатеље на вечеру.
I invited all friends to dinner.
Here, 'све' (sve) again indicates 'all' but this time is associated with books, showing completeness regarding the items in question.