This is the 490th most frequent Azerbaijani word.
olublar
"Olublar" means "they have been" in English.
The word 'olublar' indicates the past participle form of 'to be' used to describe the status of being teachers for a prolonged time.
Onlar bu məktəbdə çoxdan müəllim olublar.
They have been teachers in this school for a long time.
The word 'olublar' conveys the past existence or residence of certain people in a specific place.
Bəzi insanlar əvvəllər burada yaşamış olublar.
Some people used to live here before.
The word 'olublar' here ends the past-contextual passive phrase indicating the recommendations done by the teachers.