anno domini Meaning, Definition & Usage

  1. adverb in the Christian era; used before dates after the supposed year Christ was born
    A.D.; AD.
    • in AD 200

WordNet

An"no Dom"i*ni
Etymology
L., in the year of [our] Lord [Jesus Christ]; usually abbrev. a. d.
Definitions
  1. In the year of the Christian era; as, a. d. 1887.

Webster 1913