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View synonyms for ad
ad
1[ ad ]
-ad
2- a suffix occurring in loanwords from Greek denoting a group or unit comprising a certain number, sometimes of years: dyad; triad .
- 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, as Dunciad , after Iliad .
a.d.
3or A.D.
abbreviation for
- in the year of the Lord; since Christ was born:
Charlemagne was born in a.d. 742.
ad
4[ ad ]
noun
, Tennis.
- ad in, the advantage being scored by the server.
- ad out, the advantage being scored by the receiver.
-ad
5- variant of -ade 1: ballad .
a.d.
6abbreviation for
- before the day.
ad
7[ ad ]
preposition
- (in prescriptions) to; up to.
-ad
8- Anatomy, Zoology. a suffix forming adverbs from nouns signifying parts of the body, denoting a direction toward that part: dextrad; dorsad; mediad .
a.d.
9abbreviation for
- after date.
- autograph document.
ad-
10ad.
11abbreviation for
- adverb.
- advertisement.
A.D.
12abbreviation for
- anno Domini ( def ). Also a.d.
- assistant director.
- athletic director.
- average deviation.
-ad
1suffix forming adverbs
- denoting direction towards a specified part in anatomical descriptions
cephalad
ad
2/ æd /
noun
- short for advertisement
ad
3the internet domain name for
- Andorra
ad
4/ æd /
noun
- short for advantage Brit equivalentvan
-ad
5suffix forming nouns
- a group or unit (having so many parts or members)
triad
- an epic poem concerning (the subject indicated by the stem)
Dunciad
AD
6abbreviation for
- indicating years numbered from the supposed year of the birth of Christ anno Domini Compare BC
70 ad
- military active duty
- military air defence
- Dame of the Order of Australia
ad-
7prefix
- to; towards
adverb
adsorb
- near; next to
adrenal
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Usage Note
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.
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Usage
In strict usage, ad is only employed with specific years: he died in 1621 ad , but he died in the 17th century (and not the 17th century ad ). Formerly the practice was to write ad preceding the date ( ad 1621 ), and it is also strictly correct to omit in when ad is used, since this is already contained in the meaning of the Latin anno Domini (in the year of Our Lord), but this is no longer general practice. bc is used with both specific dates and indications of the period: Heraclitus was born about 540 bc ; the battle took place in the 4th century bc
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Word History and Origins
Origin of ad1
First recorded in 1795–1800; by shortening
Origin of ad2
Greek -ad- (stem of -as ), specialization of feminine adjective-forming suffix, often used substantively
Origin of ad3
From Latin annō Dominī
Origin of ad4
First recorded in 1915–20; by shortening
Origin of ad5
From Latin ante diem
Origin of ad6
From Latin
Origin of ad7
From the Latin word ad toward, anomalously suffixed to the noun; introduced as a suffix by Scottish anatomist John Barclay (1758–1826) in 1803
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Word History and Origins
Origin of ad1
from Latin ad to, towards
Origin of ad2
via Latin from Greek -ad- (plural -ades ), originally forming adjectives; names of epic poems are all formed on the model of the Iliad
Origin of ad3
(sense 4) Latin: in the year of the Lord
Origin of ad4
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
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