Four-o-clock meaning

fôr'ə-klŏk'
Any of several plants of the genus Mirabilis, especially M. jalapa, native to tropical America and widely cultivated for its trumpet-shaped, variously colored flowers that open late in the afternoon.
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Designating a family (Nyctaginaceae, order Caryophyllales) of dicotyledonous plants, including the bougainvilleas.
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Any of a genus (Mirabilis) of chiefly tropical American plants of the four-o'clock family, bearing petal-less flowers and, often, brightly colored leaves; esp., a garden plant (M. jalapa) with long-tubed blossoms that generally open in the late afternoonp.m.
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Any of several plants, of the genus Mirabilis, whose funnel-shaped flowers open in late afternoon.
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The friarbird; so called from its cry, which resembles these words.
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The start of the fifth hour of the day in both the 12-hour and the 24-hour clock; 4:00.
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