Examples of using "девятый" in a sentence and their english translations:
Size 9, I think.
September is the ninth month of the year.
Tell me the name of the ninth month.
Tell me the name of the ninth month.
Tell me the name of the ninth month.
Tell me the name of the ninth month.
First, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth... penultimate, last.
Apparently once you become an octogenarian you can say what you like and get away with it. I can't wait to turn eighty.