- [[t]e͟ɪ di͟ː[/t]]
You use AD in dates to indicate the number of years or centuries that have passed since the year in which Jesus Christ is believed to have been born.
The cathedral was destroyed by the Great Fire of 1136 AD...
The original castle was probably built about AD 860...
The Roman Empire was divided in the fourth century AD.
English dictionary. 2008.