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Apr 17, 2017 · Melissa Snell. Updated on April 17, 2017. A.D. is the abbreviation for Anno Domine, which is Latin for "Year of Our Lord." The term has long been used to indicate the number of years that have passed since the birth of Jesus Christ, the lord to which the phrase refers.
The term anno Domini is Medieval Latin and means "in the year of the Lord" but is often presented using "our Lord" instead of "the Lord", taken from the full original phrase " anno Domini nostri Jesu Christi ", which translates to "in the year of our Lord Jesus Christ ".
AD or (A.D.) ( anno Domini) — the Latin phrase meaning in the year of our Lord Jesus Christ, the abbreviation AD is formally placed before a year of the Christian era (i.e. AD 1999 ), but can also be placed after a year (i.e. 2006 AD ).
