9 9 /naɪn/

adjective

1. () Denoting a quantity consisting of one more than eight and one less than ten  ( ix , 9 , nine )
   denoting a quantity consisting of one more than eight and one less than ten
     There were nine flowers in the vase.
   There were nine flowers in the vase.
   

noun

1. () The cardinal number that is the sum of eight and one  ( ennead , IX , Nina from Carolina , 9 , nine , niner )
   the cardinal number that is the sum of eight and one
    My little sister is nine years old
   My little sister is nine years old