eighty eighty /ˈeɪti/

adjective

1. () Being ten more than seventy  ( fourscore [Archaic] , lxxx , eighty , 80 )
   being ten more than seventy
     The elderly woman celebrated her eightieth birthday surrounded by family.
   The elderly woman celebrated her eightieth birthday surrounded by family.
   

noun

1. The cardinal number that is the product of ten and eight  ( 80 , eighty , fourscore [Archaic] , LXXX )
   the cardinal number that is the product of ten and eight
    The temperature reached eighty degrees Fahrenheit today
   The temperature reached eighty degrees Fahrenheit today