Definify.com
Webster 1913 Edition
Four-o'clock
Four′-o’clockˊ
,Noun.
1.
(Bot.)
A plant of the genus
Mirabilis
. There are about half a dozen species, natives of the warmer parts of America. The common four-o’clock
is M. Jalapa
. Its flowers are white, yellow, and red, and open toward sunset, or earlier in cloudy weather; hence the name. It is also called marvel of Peru
, and afternoon lady
. 2.
(Zool.)
The friar bird; – so called from its cry, which resembles these words.