the eighties[plural] (also the '80s, the 1980s) the years from 1980 to 1989 (二十世纪)八十年代 The band was incredibly successful in the eighties. 这支乐队在80年代红透半边天。
the early/mid/late eighties Their troubles began in the mid eighties. 他们的麻烦开始于80年代中期。
→ the eighties at eighty(1)