The ordinal form of the number nine.

The person or thing in the ninth position. / One of nine equal parts of a whole.

To lose a ninth. / To divide by nine.

plural of ninth

simple past tense and past participle of ninth

present participle of ninth

The ordinal form of the number twenty-nine.

The person or thing in the twenty-ninth position. / Any of twenty-nine equal parts of a whole.

(baseball) The second part of the ninth and final inning; the end of the game. / (idiomatic) By extension, any last chance or final opportunity.

(US, education) The period in school that comes after eighth grade and before tenth grade.