the number equivalent to the product of six and ten; ten more than fifty; 60:a crew of sixtysixty bedroomssixty per cent of the children (Roman numeral: lx or LX)
(sixties) the numbers from sixty to sixty-nine, especially the years of a century or of a person’s life:Morris was in his early sixtiesthe flower children of the sixties
sixty miles an hour:they were doing sixty
sixty years old:he retired at sixty
a size of garment or other merchandise denoted by sixty.
