Home › Words › N › ninetysomethingninetysomethingninetysomething means A person between 90 and 99 years old.Among words judged in Lexicurio's Arena, ninetysomething ranks #26,136 of 42,752 for Qualifying.EtymologyFrom ninety + -something.nounA person between 90 and 99 years old.e.g.“She was a sprightly ninetysomething.”numAn indeterminate value between 90 (inclusive) and 100 (exclusive).Definitions & examples from Wiktionary (CC BY-SA 3.0).