adæd(n.)

1. an advertisement.

2. advertising:

   an ad agency.

Origin of ad:

1835–45; by shortening

ad^*æd(n.)

1. Category: Sport

   Ref: advantage (def. 4). 5

^* Tennis..

Origin of ad:

1925–30; by shortening

ad-

1. a prefix occurring in verbs or verbal derivatives borrowed from Latin, where it meant “toward” and indicated direction, tendency, or addition: adjoin. For variants before a following consonant, see a-5, ac-, af-, ag-, al-, an-2, ap-1, ar-, as-, at-.

   Category: Affix

Origin of ad-:

< L ad, ad- (prep. and prefix) to, toward, at, about; c. at1

-ad

1. a suffix occurring in loanwords from Greek denoting a group or unit comprising a certain number, sometimes of years:

   myriad; Olympiad; triad.

   Category: Affix

2. a suffix meaning “derived from,”“related to,”“associated with,” occurring in loanwords from Greek (dryad; oread) and in New Latin coinages on a Greek model (bromeliad; cycad).

   Category: Affix

3. a suffix used, on the model of Iliad, in the names of epics, speeches, etc., derived from proper names:

   Dunciad; jeremiad.

   Category: Affix

Origin of -ad:

< Gk -ad-, s. of -as

-ad

1. var. of -ade1:

   ballad; salad.

   Category: Affix

-ad

1. a suffix used in anatomy to form adverbs from nouns signifying parts of the body, denoting a direction toward that part:

   ectad.

   Category: Common Vocabulary, Zoology, Affix

Origin of -ad:

< L ad toward, anomalously suffixed to the noun

A.D.^*

or AD

1. in the year of the Lord; since Christ was born: Charlemagne was born ina.d.742.

   Category: Usage Note

2. assembly district.

   Category: Government

3. athletic director.

   Category: Sport

^* Usage: The abbreviation a.d. was orig. placed before a date and is still usu. preferred in edited writing: The Roman conquest of Britain began in a.d.43 (or, sometimes, began a.d.43). The abbreviation b.c. (before Christ) is always placed after a date: Caesar was assassinated in 44 b.c. But by analogy with the position of b.c. , a.d. is frequently found after the date in all types of writing: Claudius I lived from 10 b.c.to 54 a.d. This abbreviation may also designate centuries, being placed after the century specified: the second century a.d. Some writers prefer to use c.e. (Common Era) and b.c.e. (Before the Common Era) to avoid the religious overtones of a.d. and b.c.

Origin of A.D.:

L annō Dominī