1. the fifth of the seven canonical hours; about 3 p.m.;
The Collaborative International Dictionary of English v.0.48:
Nones \Nones\, n. pl. [L. nonae, so called because it was the
ninth day before the ides, fr. nonus ninth, from novem nine.
See Nine, Nones, 2, Noon .]
1. (Roman Calendar) The fifth day of the months January,
February, April, June, August, September, November, and
December, and the seventh day of March, May, July, and
October. The nones were nine days before the ides,
reckoning inclusively, according to the Roman method.
2. [F. none, fr. L. See Noon.] The canonical office, being
a part of the Breviary, recited at noon (formerly at the
ninth hour, 3 p. m.) in the Roman Catholic Church.
3. The hour of dinner; the noonday meal. [Obs.]
At my supper and sometimes at nones. --P. Plowman.
WordNet (r) 3.0 (2006):
n 1: the fifth of the seven canonical hours; about 3 p.m.