This is the 12183rd most frequent German word.
uzun
"Uzun" is not a German word; it is Turkish and means "long."
Here, "uzun" is used to describe the duration or extent of the discussion.
Wir hatten eine uzun Diskussion gestern Abend.
We had a uzun discussion yesterday evening.
In this sentence, "uzun" is borrowed into German and used as an adjective meaning "long".
Das ist ein sehr uzun Buch.
This is a very uzun book.
"Uzun" functions as an adjective referring to physical length in this sentence.