- plural form of eighty
- The decade of the 1880s, 1980s, etc.
- The decade of one's life from age 80 through age 89.
Variant of eighty
eight times ten
Origin of eightyMiddle English eighteti ; from Old English (hund)eahtatig: see eight and amp; -ty
the cardinal number between seventy-nine and eighty-one; 80; LXXX
the numbers or years, as of a century, from eighty through eighty-nine