Nonagenarian: Someone in his or her ninties, that is, between 90 and 99 years of age. See also: Age by decade.
adjective 1. of the age of 90 years, or between 90 and 100 years old. noun 2. a nonagenarian person. :10 :09 :08 :07 :06 :05 :04 :03 :02 :01 Nonagenarian has a ...
Definition of NONAGENARIAN: a person whose age is in the nineties — nonagenarian adjective. See nonagenarian defined for English-language learners »
One who is between the age of 90 and 99, inclusive. One who is in his or her tenth decade · Being between the age of 90 and 99, inclusive. In one's tenth ...
non·a·ge·nar·i·an (n n-j-nâr-n, n n-) n. A person 90 years old or between 90 and 100 years old. [From Latin n n g n rius, from n n g n, ninety each, from n n ...
Nonagenarian derives from Latin nonagenarius, "containing or consisting of ninety," from nonageni-, "ninety each", ultimately from novem, "nine," as in November ...