90 90 /ˈnaɪnti/

adjective

1. () Being ten more than eighty  ( xc , ninety , 90 )
   being ten more than eighty
   

noun

1. The cardinal number that is the product of ten and nine  ( 90 , ninety , XC )
   the cardinal number that is the product of ten and nine
    My great grandmother just turned ninety years old and we had a big party for her
   My great grandmother just turned ninety years old and we had a big party for her