VOOZH about

URL: https://www.wordreference.com/definition/ad

⇱ ad - WordReference.com Dictionary of English

ad

Listen:
UK:**UK and possibly other pronunciationsUK and possibly other pronunciations'AD': /ˌeɪˈdiː/; 'ad': /ˈæd/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/æd/ ,USA pronunciation: respelling(ad)


WordReference Random House Learner's Dictionary of American English © 2026
ad1 /æd/USA pronunciation   n. [countable]
  1. an advertisement.

adj. [before a noun]
  1. advertising: an ad agency.

A.D. or AD,an abbreviation of
  1. PronounsLatin anno Domini : in the year of the Lord;
    since Christ was born (used with dates): Charlemagne was born in a.d. 742.

WordReference Random House Unabridged Dictionary of American English © 2026
ad1  (ad),USA pronunciation n. 
  1. advertisement.
  2. advertising:an ad agency.
  • by shortening 1835–45

ad2  (ad),USA pronunciation n. [Tennis.]
  1. Sportadvantage (def. 5).
  2. Sport ad in, the advantage being scored by the server.
  3. Sport ad out, the advantage being scored by the receiver.
  • by shortening 1945–50

ad3  (ad),USA pronunciation prep. 
  1. (in prescriptions) to;
    up to.
  • Latin

ad-, 
  1. a prefix occurring in loanwords from Latin, where it meant "toward'' and indicated direction, tendency, or addition:adjoin.Usually assimilated to the following consonant;
    see a-5, ac-, af-, ag-, al-, an- 2, ap-1, ar-, as-, at-. 
  • Latin ad, ad- (preposition and prefix) to, toward, at, about; cognate with at1

-ad1 ,
  1. a suffix occurring in loanwords from Greek denoting a group or unit comprising a certain number, sometimes of years:dyad; triad.
  2. a suffix meaning "derived from,'' "related to,'' "concerned with,'' "associated with'' (oread), introduced in loanwords from Greek (Olympiad; oread), used sporadically in imitation of Greek models, asDunciad,afterIliad.
  • Greek -ad- (stem of -as), specialization of feminine adjective-forming suffix, often used substantively

-ad2 ,
  1. var. of -ade 1:ballad.

-ad3 ,
  1. [Anat., Zool.]a suffix forming adverbs from nouns signifying parts of the body, denoting a direction toward that part:dextrad;dorsad;mediad.
  • Latin ad toward, anomalously suffixed to the noun; introduced as a suffix by Scottish anatomist John Barclay (1758–1826) in 1803

ad., 
    1. Grammaradverb.
    2. Business, advertisement.

A.D., 
    1. active duty.
    2. Pronounsin the year of the Lord;
      since Christ was born:Charlemagne was born in a.d. 742.
    3. art director.
    4. Governmentassembly district.
    5. assistant director.
    6. athletic director.
    7. average deviation.
      Because anno Domini means "in the year of the Lord,'' its abbreviation a.d. was originally placed before rather than after a date:The Roman conquest of Britain began in a.d. 43 (or began a.d. 43). In edited writing, it is still usually placed before the date. But, by analogy with the position of b.c. "before Christ,'' which always appears after a date (Caesar was assassinated in 44 b.c.), a.d. is also frequently found after the date in all types of writing, including historical works:The Roman emperor Claudius I lived from 10 b.c. to 54 a.d. Despite its literal meaning, a.d. is also used to designate centuries, being placed after the specified century:the second century a.d.
a.d., 
    1. after date.
    2. before the day.
    3. autograph document.

Collins Concise English Dictionary © HarperCollins Publishers::
ad /æd/ n
  1. short for advertisement
ad /æd/ n US Canadian
  1. short for advantage
Collins Concise English Dictionary © HarperCollins Publishers::
AD abbreviation for
  1. (indicating years numbered from the supposed year of the birth of Christ) anno Domini: 70 ad
    Compare BC
Etymology: (sense 4) Latin: in the year of the Lord
Collins Concise English Dictionary © HarperCollins Publishers::
ad- prefix
  1. to; towards: adsorb, adverb
  2. near; next to: adrenal
Etymology: from Latin: to, towards. As a prefix in words of Latin origin, ad- became ac-, af-, ag-, al-, an-, acq-, ar-, as-, and at- before c, f, g, l, n, q, r, s, and t, and became a- before gn, sc, sp, st
'ad' also found in these entries (note: many are not synonyms or translations):

🗣️Forum discussions with the word(s) "ad" in the title:


Look up "ad" at Merriam-Webster
Look up "ad" at dictionary.com
  • Go to Preferences page and choose from different actions for taps or mouse clicks.

In other languages: Spanish | French | Italian | Portuguese | Romanian | German | Dutch | Swedish | Russian | Polish | Czech | Greek | Turkish | Chinese | Japanese | Korean | Arabic

Advertisements
Advertisements
Report an inappropriate ad.
WordReference.com
WORD OF THE DAY
GET THE DAILY EMAIL!
Become a WordReference Supporter to view the site ad-free.
Firefox users: use search shortcuts for the fastest search of WordReference.
Copyright © 2026 WordReference.com
Please report any problems.