This is the 693rd most frequent Persian word.
قبلی
Previous
Here, 'قبلی' refers to 'last' and signifies the year directly before the current one.
سال قبلی برف زیادی بارید.
Last year it snowed a lot.
Here, 'قبلی' means 'previous' and refers to the book that precedes the current one in context.
کتاب قبلی را تمام کردم.
I finished the previous book.
In this context, 'قبلی' means 'previous' and points to the article discussed before the current one.