Meaning

noun the fifth of the seven canonical hours; about 3 p.m.

noun a canonical hour that is the ninth hour of the day counting from sunrise

noun a service in the Roman Catholic Church formerly read or chanted at 3 PM (the ninth hour counting from sunrise) but now somewhat earlier

originFrom Latin nōnus (“ninth”). As a day of the Roman calendar, via nōnae (“ninth days”) from the original Roman practice of counting forward to the next full or new crescent moon, the nones' occurrence 8 days before the ides of every month (9 counting inclusively) following the establishment of a fixed calendar, and from the Latin practice of treating most recurring calendrical days as plurals. Some…

Etymology from Wiktionary, CC BY-SA 3.0