A.D.

 Dictionary entry overview: What does A.D. mean? 

• A.D. (adverb)
  The adverb A.D. has 1 sense:

1. in the Christian era; used before dates after the supposed year Christ was born

  Familiarity information: A.D. used as an adverb is very rare.

 Dictionary entry details 

• A.D. (adverb)

Sense 1

Meaning:

In the Christian era; used before dates after the supposed year Christ was born

Synonyms:

A.D.; AD; anno Domini

Context example:

in AD 200

 Context examples 

There was a box of vestas, two inches of tallow candle, an A.D.P. briar-root pipe, a pouch of seal-skin with half an ounce of long-cut Cavendish, a silver watch with a gold chain, five sovereigns in gold, an aluminium pencil-case, a few papers, and an ivory-handled knife with a very delicate, inflexible blade marked Weiss & Co., London.

(The Memoirs of Sherlock Holmes, by Sir Arthur Conan Doyle)