40 40 /ˈfɔrti/

adjective

1. () Being ten more than thirty  ( xl , twoscore [Archaic] , forty , 40 )
   being ten more than thirty
     The house had forty rooms and a large garden.
   The house had forty rooms and a large garden.
   

noun

1. () The cardinal number that is the product of ten and four  ( forty , XL , 40 )
   the cardinal number that is the product of ten and four
    He ran forty miles in one day
   He ran forty miles in one day