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Pronunciation: (ad), [key]
1. advertisement.
2. advertising: an ad agency.


Pronunciation: (ad), [key]
n. Tennis.
1. advantage (def. 5).
2. ad in, the advantage being scored by the server.
3. ad out, the advantage being scored by the receiver.


Pronunciation: (ad), [key]
(in prescriptions) to; up to.


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-.


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, as Dunciad, after Iliad.


var. of -ade 1: ballad.


Anat., Zool.a suffix forming adverbs from nouns signifying parts of the body, denoting a direction toward that part: dextrad; dorsad; mediad.


1. adverb.
2. advertisement.


1. active duty.
2. in the year of the Lord; since Christ was born: Charlemagne was born in a.d. 742.
3. art director.
4. assembly district.
5. assistant director.
6. athletic director.
7. average deviation.


1. after date.
2. before the day.
3. autograph document.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

See also:
  • ad (Thesaurus)


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