AD

AD, A.D., anno Domini

(adverb) in the Christian era; used before dates after the supposed year Christ was born; “in AD 200”

ad, advertisement, advertizement, advertising, advertizing, advert

(noun) a public promotion of some product or service

Source: WordNet® 3.1

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Adverb

AD

(often, punctuated) Initialism of anno Domini (borrowed from Latin); in the year of our Lord.

Usage notes

• The initialism is used to specify numbered years counting from the once estimated birth of Christ in year 1.

• The Chicago Manual of Style, as well as most house styles, requires placing AD before the number of the year and BC after, although in casual use either abbreviation can be found in either place. It is placed after centuries. It is often printed in small caps.

• Some use CE, for "Common Era", which is more secular in nature, to avoid potential Christian bias.

• "AD" is not normally used in expressions like "in the year AD 1990", since in such a year it is taken for granted (and it is also redundant, literally meaning "in the year in the year of our Lord 1990"). In "Vesuvius erupted in AD 79", it is expected.

Synonyms

• (anno Domini): AC, A.C. (anno Christi); anno Domini, Anno Domini, CE, Christian Era, in the year of our Lord

Antonyms

• (anno Domini): AC, A.C. (ante Christum); b.c, BC, B.C. (before Christ); BCE

Noun

AD (plural ADs)

(film) Assistant director.

(military) Air defence or air defense.

Antidepressant.

(US, Navy) Auxiliary destroyer - a naval tender, a destroyer tender that tends to destroyers.

(uncountable) Alzheimer's disease.

(aviation) Initialism of airworthiness directive.

(business) Initialism of anti-dumping.

Coordinate terms

• (destroyer tender): AS

Proper noun

AD

Abu Dhabi

Anagrams

• D. A., D.A., DA, Da, da

Etymology 1

Noun

ad (plural ads)

advertisement.

Synonyms

• advert

Etymology 2

Noun

ad (plural ads)

(tennis) advantage

(debating) advantage

Etymology 3

Preposition

ad

to, toward

Anagrams

• D. A., D.A., DA, Da, da

Source: Wiktionary

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