twelve o'clock

Noun

twelve o'clock (usually uncountable, plural twelve o'clocks)

1. (usually, In both the 12-hour clock and the 24-hour clock) The start of the thirteenth hour of the day; noon (noontime); 12:00 p.m. (12:00).
   • The next train comes at twelve o'clock (= "The next train comes at noon").
2. (usually, Only in the 12-hour clock) The start of the first hour of the day; midnight; 12:00 a.m. (00:00).
   • The bar closes at twelve o'clock (= "The bar closes at midnight").
3. (informal, usually) A position straight ahead (horizontal clock orientation) or above (vertical clock orientation) (from the location of the 12 mark on a clock face)
   • We've got a bogey at twelve o'clock (= "We've got a bogey straight in front of us").