1. The time of life between 80 and 90
   "Despite being in his mid-eighties, he still enjoyed daily walks";
   - mid-eighties
    
2. The decade from 1980 to 1989
   "Personal computers became widespread in homes during the eighties";
   - 1980s
    
3. The decade from 1880 to 1889
   "The Statue of Liberty was completed in the eighties";
   - 1880s

1. The cardinal number that is the product of ten and eight
   "She lived to be eighty";
   - 80, LXXX, fourscore [archaic]

Type of: decade, decennary [archaic], decennium, large integer, time of life

Part of: age, eld, geezerhood [informal], old age, years

Encyclopedia: Eighties