Main Page | See live article | Alphabetical index AD AD or ad may stand for: ad or advertisement, see advertising ad- prefix Andorra, ISO country code anno anno Domini ("[in the] year of [Our] Lord"). This year is A.D. . Synonym: "CE" (Common Era). anno Diocletiani, the original meaning, see Roman calendar#Years the US Navy hull classification symbol for Destroyer Tender This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.