seven o'clock noun3 •The start of the eighth hour of the day; 7:00 a.m. (07:00).The breakfast buffet opens at seven o'clock (= "The breakfast buffet opens at 7:00 a.m."). •The start of the twentieth hour of the day; 7:00 p.m. (19:00).Supper was served at seven o'clock (= "Supper was served at 7:00 p.m."). •(informal) A position behind and slightly to the left (horizontal clock orientation) (from the location of the 7 mark on a clock face)We've got a bogey at seven o'clock.
