The term "11th" refers to the ordinal number that comes after the tenth and before the twelfth. It is commonly used to indicate position in a sequence, such as in a race or a list. For example, if someone finishes a race in 11th place, it means they were the eleventh person to cross the finish line.
In the context of time, "11th" can also refer to the 11th day of a month. For instance, November 11th is recognized in many countries as a day of remembrance for those who served in the military, known as Veterans Day in the United States and Remembrance Day in other nations.