Definition of anno domini; A.D.
- in the year of the Lord
- used for dates in the Christian era
Usage examples of anno domini; A.D.
The inscription says 1066 A.D., placing the event in the Christian era.
Anno domini literally means 'in the year of the Lord' and appears in many historical dates.
The castle was built in A.D. 1200, long after the Roman Empire had fallen.