eighty

number (plural eighties)

• equivalent to the product of eight and ten; ten less than ninety; 80:eighty miles north a buffet for eighty eighty of the nurses fled (Roman numeral: lxxx or LXXX)
• (eighties) the numbers from 80 to 89, especially the years of a century or of a person’s life:his grandmother was in her eighties
• eighty years old:he was over eighty at the time
• eighty miles an hour:roaring down the highway doing eighty