This is the 6815th most frequent Turkish word.
birgün
"Birgün" means "one day" or "someday" in English.
Here, 'birgün' signifies an indefinite future time, meaning 'one day' or 'someday'.
Birgün seni görmeye geleceğim.
One day, I will come to see you.
The word 'birgün' represents hope or aspiration for a specific but unspecified day in the future.
Birgün bütün hayallerini gerçekleştireceksin.
One day, you will achieve all your dreams.
In this sentence, 'birgün' refers to the concept of a single day in general.