eightyeigh‧ty /ˈeɪti/ ●●● W3 number 
The band was incredibly successful in the eighties.the early/mid/late eighties Their troubles began in the mid eighties.3 be in your eighties to be aged between 80 and 89early/mid/late eighties Hilda Simpson was a woman in her early eighties.4 in the eighties if the temperature is in the eighties, it is between 80 degrees and 89 degreesin the low/mid/high eighties The temperature is expected to remain in the low eighties.—eightieth adjective: her eightieth birthday
WORD ORIGINeighty
Origin:
Old English eahtatig, from eahta ‘eight’WORD SETS
add, verbaddition, nounArabic numeral, nounarithmetic progression, nounbi-, prefixbillion, numbercalculate, verbcalculation, nouncardinal, nouncardinal number, nouncoefficient, nouncommon denominator, nounconstant, nouncube, verbcube root, nounD, noundecimal, noundecimal, adjectivedecimal point, noundemi-, prefixdenominator, noundigit, noundivide, verbdividend, noundivisible, adjectivedivision, noundivisor, noundouble-digit, adjectivedouble figures, nouneight, numbereighteen, numbereighth, adjectiveeighty, numbereleven, numberequal, adjectiveequal, verbequals sign, nouneven, adjectiveexponent, nounfactor, nounfactor, verbfactorial, nounfifteen, numberfifth, nounfifty, numberfig., figure, nounfive, numberforty, numberfour, numberfourteen, numberfourth, nounfraction, noungeometric progression, noungross, nounHCF, hundred, numberimproper fraction, nounindivisible, adjectiveinfinity, nouninteger, nounL, nounlogarithm, nounlowest common denominator, nounM, nounmedian, nounmedian, adjectivemillion, numbermultiple, nounmultiplication, nounmultiplication sign, nounmultiplication table, noun-nd, suffixnegative, adjectivenine, numbernineteen, numberninety, numberninth, adjectiveNo., nos., nothing, pronounnought, numbernumber, nounnumeral, nounnumerator, nounnumerical, adjectiveO, nounoblique, nounone, numberordinal number, nounpi, nounplot, verbplus, prepositionpoint, nounpositive, adjectiveprime number, nounproduct, nounproper fraction, nounproportion, nounquadr-, prefixquadrillion, numberquadruple, adjectivequotient, noun-rd, suffixroman numeral, nounroot, nounround, adjectivescore, numbersecond, numberserial number, nounset, nounsingle figures, nounsix, numbersixteen, numbersixty, numbersquare, nounsquare, verbsquared, adjectivesquare root, noun-st, suffixsubtract, verbsum, nountake, verbten, numbertenth, adjectivetertiary, adjectivetetra-, prefixthirteen, numberthirty, numberthousand, numberthree, numberthree-quarter, adjectivethreescore, numbertreble, determinertri-, prefixtrillion, numbertwelve, numbertwenty, numbertwice, adverbunit, nounV, nounvulgar fraction, nounwhole number, nounX, nounzero, number
COLLOCATIONS FROM THE ENTRY Their troubles began in the mid eighties. Hilda Simpson was a woman in her early eighties. The temperature is expected to remain in the low eighties.
1the number 802 the eighties [plural] (also the '80s, the 1980s) the years from 1980 to 1989: Their troubles began in the mid eighties. Hilda Simpson was a woman in her early eighties. The temperature is expected to remain in the low eighties. The band was incredibly successful in the eighties.the early/mid/late eighties Their troubles began in the mid eighties.3 be in your eighties to be aged between 80 and 89early/mid/late eighties Hilda Simpson was a woman in her early eighties.4 in the eighties if the temperature is in the eighties, it is between 80 degrees and 89 degreesin the low/mid/high eighties The temperature is expected to remain in the low eighties.—eightieth adjective: her eightieth birthday