nones
A. ninth day before the Ides XV;

B. the fourth of the day offices of the Church. XVIII. In A — (O)F. — L. nōnœ, acc. nōnās, fem. pl. of nōnus ninth, f. novem NINE; in B f. NONE2 after mattins, lauds, vespers.
Also none² third quarter of the day XVII; nones (sense B) XIX. — (O)F. — L. nōna. cf. NOON.

nones / nōnz/ • pl. n. 1. in the ancient Roman calendar, the ninth day before the ides by inclusive reckoning, that is, the 7th day of March, May, July, and October, or the 5th of other months.2. another term for none² .

nones in the ancient Roman calendar, the ninth day before the ides by inclusive reckoning, i.e. the 7th day of March, May, July, October, the 5th of other months. Recorded from late Middle English, the word comes via Old French from Latin nonas, feminine accusative plural of nonus ‘ninth’.

In the Christian Church, nones is the name for the fifth of the canonical hours of prayer, originally appointed for the ninth hour of the day (about 3 p.m.), and the office appointed for this hour.