ad

adv

1. (abbreviation, alt-of, initialism)Initialism of Anno Domini (borrowed from Latin); in the year of our Lord.

   “They had a vibrant culture from the 3rd century BC to the 2nd century AD.”

   “Today is 15 May AD 2026.”

   “Founded Aᴼ.Dᴵ. 1728 by Benj. Franklin”

   “There is a striving towards naturalism in agricultural scenes painted on bricks in tombs of the third century AD recently excavated at Chia-yü-kuan in Kansu Province which is reminiscent of later European illuminated manuscripts such as the English fifteenth-century Luttrell Psalter in the British Library.”

   “But keep on the lookout for the 1st-century-a.d. stele on the right wall, with symbols of the deceased’s civic scribely duties (a scroll and codex), and the fresco remnants around to the left.”

noun

1. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of assistant director.

   “A few moments later, the A.D. reappears. "They need you," she says. "And could you stop by Wardrobe?" Shannen rolls her eyes. "O.K.!" she snaps.”

2. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of air defence or air defense.
3. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of antidepressant.
4. (Navy, US, abbreviation, alt-of, countable, initialism, uncountable)Initialism of auxiliary destroyer (a naval tender, a destroyer tender that tends to destroyers).
5. (abbreviation, alt-of, initialism, uncountable)Initialism of Alzheimer's disease.

   “Many neurodegenerative diseases, including Alzheimer's disease (AD), involve pathological protein deposits.”

   “What the person with AD chooses to enunciate, ‘may capture something important in the way the person makes sense of his or her life and also make meaning-based connections’ (Hydén and Örulv 2009: 206).”

6. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of atopic dermatitis.
7. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of airworthiness directive.
8. (abbreviation, alt-of, countable, uncountable)Abbreviation of audio description.
9. (Internet, abbreviation, alt-of, countable, initialism, uncountable)Initialism of after dark.

   “AD account”

10. (abbreviation, alt-of, clipping)Clipping of advertisement.

    “I have placed both of the ads in the newspaper as instructed.”

    “However, the ad that was seen as the most successful in 2000 reflected Chen Shui-bian's Taiwanese roots, that was the Kuantien Ad that showed the small town where he had grown up, his neighbours, relatives and people that had known him as a child.”

    “In the final few weeks before the vote, a rash of ads appeared on radio and TV claiming that Hillary Clinton was too frail, too liberal and too ethically compromised to become president. […] Not many people took Morris’s ad too seriously; most news outlets were pleased for a frothy story in an election that was short on light relief.”

11. (abbreviation, alt-of, clipping)Clipping of advertising.
12. (abbreviation, alt-of, clipping)Clipping of advertiser.
13. Advantage; also, designating the left-hand side, from the player's point of view, of their half of the court, where the advantage point following a deuce is always played.

    “[S]uddenly Agassi hits a hard heavy cross-court back hand that pulls Federer way out to his ad (= his left) side, and Federer gets to it but slices the stretch backhand short, a couple feet past the service line […].”

14. Advantage

    “ads and disads”

15. (abbreviation, alt-of)Abbreviation of adenovirus.

adj

1. (abbreviation, alt-of, initialism, not-comparable)Initialism of antidumping.

name

1. (abbreviation, alt-of, initialism)Initialism of Abu Dhabi.
2. (India, abbreviation, alt-of, initialism)Initialism of Andhra Pradesh.

prep

1. to, toward