Original: The term Anno Domini is Medieval Latin , translated as In the year of ( the\/Our ) Lord . It is sometimes specified more fully as Anno Domini Nostri Iesu ( Jesu ) Christi ( '' In the Year of Our Lord Jesus Christ '' ) .
Simplified: Anno Domini ( Latin : '' In the year of ( our ) Lord '' ) , shortened as AD or A.D. , is used to refer to the years after the birth of Jesus .