four o'clock

Noun

• The start of the fifth hour of the day; 4:00 a.m. (04:00).
• The start of the seventeenth hour of the day; 4:00 p.m. (16:00).
• A position to the right and slightly behind (horizontal clock orientation)
• Any of several plants, of the genus Mirabilis, whose funnel-shaped flowers open in late afternoon.
• The friarbirds (Philemon spp.); so called from its cry, which resembles these words.