This is the 424th most frequent Azerbaijani word.
üçüncü
"Üçüncü" means "third" in English.
Here, 'üçüncü' refers to the position of an option in a sequence.
Üçüncü seçimi düşünməlisən.
You should consider the third option.
Here, 'üçüncü' functions as an ordinal number describing the position of the book.
Bu mənim üçüncü kitabımdır.
This is my third book.
In this sentence, 'üçüncü' specifies the frequency or order of the meeting.