Q. 1. What is the meaning of the Latin phrase "Anno Domini" that is often followed by the letters A.D.?
A. 1. "Anno Domini" means "in the year of the Lord." "Anno Domini" is the short version of "Short for Anno Domini Nostri Iesu Christi" that means "in the Year of Our Lord Jesus Christ."
This is the system used to date years based on the perceived date on which Christ was born. This system is called the Gregorian Calendar.
The years prior to the birth of Jesus were referred to as "A.C.n". That means "Ante Christim Natum" or "Before Christ was born." At present, the English abbreviation used is "B.C." which means "Before Christ."