thirty thirty /ˈθɝːˌdiː/

adjective

1. () Being ten more than twenty  ( xxx , thirty , 30 )
   being ten more than twenty
     The party had thirty guests in attendance.
   The party had thirty guests in attendance.
   

noun

1. () The cardinal number that is the product of ten and three  ( XXX , thirty , 30 )
   the cardinal number that is the product of ten and three
    She turned thirty years old last week
   She turned thirty years old last week