Learner's definition of NINE
the ninth in a set or series
“What time is it?” “It's nine.”
He woke up at nine this morning.
a nine-to-five job [=a job that you work during regular business hours usually in an office]
the first or last nine holes of an 18-hole golf course
— usually singular
the whole nine yards
to the nines
in a very fancy or impressive way
I would like nine (of them), please.
Nine out of 10 [=90 percent of] doctors agree that this treatment works.