This is the 580th most frequent Azerbaijani word.
birində
"Birində" in English means "in one of them."
Here, 'birində' refers to 'in one of' specifying one among several.
Kitablardan birində maraqlı bir hekayə oxudum.
I read an interesting story in one of the books.
In this sentence, 'birində' denotes 'in one (person, entity) among' referring to one friend from a group.
Dostlarımın birində əla bir fikir var idi.
One of my friends had a great idea.
Here, 'birində' means 'in one of' a set of events (parties) indicating a specific occurrence within a group.