from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. In the year of our Lord (often abbreviated A.D. or AD).
from the GNU version of the Collaborative International Dictionary of English
- In the year of the Christian era; as, a. d. 1887.
from The Century Dictionary and Cyclopedia
- In the year of the Lord; in the year of the Christian era. Commonly abbreviated a. d.: as, the battle of Bunker Hill was fought a. d. (or a. d.) 1775.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. in the Christian era; used before dates after the supposed year Christ was born
From the Latin annō Domini ("in the year of the Lord") from the word annō ("in the year") the ablative of annus ("year") + Domini ("of the Lord") the genitive of Dominus ("the Lord"). (Wiktionary)