This is the 4234th most frequent Turkish word.
osman
"Osman" is a Turkish male given name, derived from the Arabic name Uthman.
The name "Osman" is used as a proper noun referring to a person in this sentence.
Osman bugün okula gitti.
Osman went to school today.
The word "Osmanlı" derives from the name "Osman" and is used to refer to the Ottoman period or entities related to it.
Tarihte Osmanlı Devleti büyük bir imparatorluktu.
In history, the Ottoman Empire was a great empire.
The word "Osman'" in the possessive case indicates that "Osman" is the writer of the book.