Definition of Anno Domini in US English:

Anno Domini

adverb

  • full form of AD
    • ‘The counterpart to Anno Domini is B.C. for ‘Before Christ.’’
    • ‘A.D. is a Latin abbreviation for Anno Domini, in the year of our Lord. A.D. is used with dates in the current era.’
    • ‘When Dionysius continues his table, he dates the years in the cycle from the incarnation of Christ (anno domini is Latin for "year of the lord").’
    • ‘The system of numbering years A.D. (for "Anno Domini", "in the year of Our Lord") began in the year 525.’

Origin

Latin, ‘in the year of the Lord’.

Pronunciation

Anno Domini

/ˌænoʊ ˈdɑməni//ˌanō ˈdämənē/