The cardinal number occurring after seventy-nine and before eighty-one, represented in Roman numerals as LXXX and in Arabic numerals as 80.

The decade of the 1880s, 1980s, etc. / The decade of one's life from age 80 through age 89. / (temperature, rates, plural only) The range between 80 and 89.

From or evoking the 81st through 90th years of a century (chiefly the 1980s).

plural of eighty

The ordinal form of the number eighty-one, describing a person or thing in position number 81 of a sequence.

One of eighty-one equal parts of a whole.

The cardinal number following eighty and preceding eighty-two.

Number between eighty-seven and eighty-nine; decimal 88 / An abbreviation for 'Hugs and kisses' in amateur radio. Used especially in Morse code. / (slang) A piano (from the number of keys)

The cardinal number immediately following eighty-eight and preceding ninety.

The cardinal number immediately following eighty-three and preceding eighty-five.