This is the 4863rd most frequent Arabic word.
الدوري
"The league" or "the round."
Here, "الدوري" refers to the competitive sporting league.
الدوري هو لقب البطولة الكروية الوطنية.
The league is the title of the national soccer championship.
In this context, "الدوري" means 'regular' or 'recurring' teachers.
زار المدرسة كافة المدرسين الدوريين.
All the regular teachers visited the school.
"الدوري" in this sentence refers specifically to sports leagues broadcasted on television.