Dictionary
four-o'clock
Pronunciation: (fôr'u-klok", fōr'-), [key]—
n.
1. a common garden plant,
Mirabilis jalapa, of the four-o'clock family, having tubular red, white, yellow, or variegated flowers that open late in the afternoon.
2. any plant of the same genus.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.