(in the ancient Roman calendar) the ninth day before the ides, both days included: the seventh of March, May, July, and October, and the fifth of the other months.
Origin: 1375–1425; late ME; Anglicization of L nōnae, orig. fem. pl. of nōnus ninth
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; see new in Indo-European roots.]