sixtysix‧ty /ˈsɪksti/ ●●● W3 number 
sixty years ago2the sixties [plural] (also the '60s, the 1960s) the years from 1960 to 1969: The book was written in the sixties.the early/late sixties the student riots in Paris in the late sixties3be in your sixties to be aged between 60 and 69early/mid/late sixties I’d say she was in her late sixties.4 in the sixties if the temperature is in the sixties, it is between 60 degrees and 69 degreesin the low/mid/high sixties a fine spring day, with the temperatures in the low sixties—sixtieth adjective, pronoun: her sixtieth birthday
WORD ORIGINsixty
Origin:
Old English sixtig, from six ‘six’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 the student riots in Paris in the late sixties I’d say she was in her late sixties. a fine spring day, with the temperatures in the low sixties
1the number 60: the student riots in Paris in the late sixties I’d say she was in her late sixties. a fine spring day, with the temperatures in the low sixties sixty years ago2the sixties [plural] (also the '60s, the 1960s) the years from 1960 to 1969: The book was written in the sixties.the early/late sixties the student riots in Paris in the late sixties3be in your sixties to be aged between 60 and 69early/mid/late sixties I’d say she was in her late sixties.4 in the sixties if the temperature is in the sixties, it is between 60 degrees and 69 degreesin the low/mid/high sixties a fine spring day, with the temperatures in the low sixties—sixtieth adjective, pronoun: her sixtieth birthday