used in the Christian calendar to show a particular number of years since the year when Christ was believed to have been born (from Latin‘Anno Domini’) in (the year) A.D. 55 in 55 A.D. in the fifth century A.D. compare A.H., B.C., B.C.E., C.E.
Want to learn more?
Find out which words work together and produce more natural sounding English with the Oxford Collocations Dictionary app.
Check pronunciation: A.D.