sexagenarian/ˌsɛksəd͡ʒɪˈnɛɹiən/EtymologyFrom Latin sexāgēnārius (“containing 60”) + -an (forming adjectives and representative nouns), either directly or via French sexagénaire, from Latin sexāgēnus (“60 each”) + -ārius (“-ary”), from sexāgintā (“six tens, 60”).adjOf or related to sixtysomethings.nounSynonym of sixtysomething: a person between 60 and 69 years old.“Luxury hotels and travel planners must be licking their lips at the prospect that a significant portion of those new sexagenarians will want the trip of a lifetime (and hang the kids' inheritance…).”