1. [ adjective ] coming next after the eighth and just before the tenth in position
Synonyms: 9th
Related terms: ordinal
2. [ noun ] position nine in a countable series of things

"going into the ninth they were a run ahead"

Related terms: rank
3. [ noun ] (mathematics) a ninth part
Synonyms: one-ninth
Related terms: common_fraction
Similar spelling:   Nintu