eleven o'clock

Short definition from Wiktionary

Noun

1. 1
   The start of the twelfth hour of the day; 11:00 a.m. (11:00).
2. 2
   The start of the twenty-fourth hour of the day; 11:00 p.m. (23:00).
3. 3
   A position ahead and slightly to the left (horizontal clock orientation) (from the location of the 11 mark on a clock face)
4. 4
   Moss-rose purslane, a flowering plant of species Portulaca grandiflora