From Longman Dictionary of Contemporary EnglishRelated topics: Numbersninthninth1 /naɪnθ/ ●●●S3W3 adjectiveHMNcoming after eight other things in a series
in the ninth century
her ninth birthday —ninth pronoun
I’m planning to leave on the ninth (=ninth day of the month).Examples from the Corpusninth• Sam is in ninthgrade.on the ninth• The building was opened on the ninthanniversary of her death in 1862 and was for the consumptivepoor.• Early on the ninthnight, he tells us, the crucialhealingdance began.ninthninth2 noun [countable]PARTone of nine equal parts of something