- The ninth day before the ides of a month; in the ancient Roman calendar, the seventh day of March, May, July, or October and the fifth day of the other months.
- Ecclesiastical.
- The fifth of the seven canonical hours. No longer in liturgical use.
- The time of day appointed for this service, usually the ninth hour after sunrise.
[Middle English, from Old French, from Latin nōnae, feminine pl. of nōnus, ninth.]






