noun
ninth
One of nine equal parts of a whole.
Each of the nine equal slices represents a ninth of the pizza.
Etymology
Ninth is the ordinal of nine, used as a fraction-name. A ninth is one portion when the whole has been divided into nine equal portions.
More examples
- One ninth of the class stays after school.
- Two ninths of the garden are planted with beans.
- She divides each third into three ninths.
Forms
ninth · ninths