- consisting of nine.
- of, relating to, or noting a numerical system based on the number 9.
- a number in a nonary system.
Origin of nonary
1660–70; < Latin nōnārius of, belonging to the ninth (hour), equivalent to nōn(us) ninth + -ārius -ary
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018