| 单词 | ad |
| 释义 | ad1[ ad ] / æd / SEE SYNONYMS FOR ad ON THESAURUS.COM nounadvertisement. advertising: an ad agency. Origin of ad1First recorded in 1835–45; by shortening WORDS THAT MAY BE CONFUSED WITH ad1. ad , add, odd2. adds, ads , adzDefinition for ad (2 of 12)ad2 [ ad ] / æd / noun Tennis.advantage (def. 5). ad in, the advantage being scored by the server. ad out, the advantage being scored by the receiver. Origin of ad2First recorded in 1945–50; by shortening Definition for ad (3 of 12)ad3 [ ad ] / æd / preposition(in prescriptions) to; up to. Origin of ad3From Latin Definition for ad (4 of 12)ad- 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-. Origin of ad-<Latin ad, ad- (preposition and prefix) to, toward, at, about; cognate with at1 Definition for ad (5 of 12)-ad1 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. Origin of -ad1Greek -ad- (stem of -as ), specialization of feminine adjective-forming suffix, often used substantively Definition for ad (6 of 12)-ad2 variant of -ade1: ballad. Definition for ad (7 of 12)-ad3 Anatomy, Zoology. a suffix forming adverbs from nouns signifying parts of the body, denoting a direction toward that part: dextrad; dorsad; mediad. Origin of -ad3From the Latin word ad toward, anomalously suffixed to the noun; introduced as a suffix by Scottish anatomist John Barclay (1758–1826) in 1803 Definition for ad (8 of 12)ad. adverb. advertisement. Definition for ad (9 of 12)a.d.1 or A.D.in the year of the Lord; since Christ was born: Charlemagne was born in a.d. 742. Origin of a.d.1From Latin annō Dominī usage note for a.d.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. Definition for ad (10 of 12)a.d.2 before the day. Origin of a.d.2From Latin ante diem Definition for ad (11 of 12)a.d.3 after date. autograph document. Definition for ad (12 of 12)A.D. abbreviationDictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for ad (1 of 7)ad1 / (æd) / nounshort for advertisement British Dictionary definitions for ad (2 of 7)ad2 / (æd) / noun tennis, US and Canadianshort for advantage Brit equivalent: van British Dictionary definitions for ad (3 of 7)ad3 the internet domain name forAndorra British Dictionary definitions for ad (4 of 7)AD abbreviation for(indicating years numbered from the supposed year of the birth of Christ) anno Domini70 ad Compare BC military active duty military air defence Dame of the Order of Australia Word Origin for AD(sense 4) Latin: in the year of the Lord usage for ADIn 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 British Dictionary definitions for ad (5 of 7)ad- prefixto; towardsadsorb; adverb near; next toadrenal Word Origin for ad-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 British Dictionary definitions for ad (6 of 7)-ad1 suffix forming nounsa group or unit (having so many parts or members)triad an epic poem concerning (the subject indicated by the stem)Dunciad Word Origin for -advia Latin from Greek -ad- (plural -ades), originally forming adjectives; names of epic poems are all formed on the model of the Iliad British Dictionary definitions for ad (7 of 7)-ad2 suffix forming adverbsdenoting direction towards a specified part in anatomical descriptionscephalad Word Origin for -adfrom Latin ad to, towards Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for adA.D. An abbreviation used with a date, indicating how many years have passed since the birth of Jesus. The abbreviation may appear before the date (a.d. 1988), or it may appear after the date (1988 a.d.). It stands for anno Domini, a Latin phrase meaning “in the year of our Lord.” (Compare b.c.) The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for ad (1 of 3)AD abbr.auris dextra (right ear) Medical definitions for ad (2 of 3)ad- pref.Toward; to. Before c, f, g, k, l, p, q, s, and t, ad- is usually assimilated to ac-, af-, ag-, ac-, al-, ap-, ac-, as-, and at-, respectively:adductor, acclimation, agglutinant. Near; at:adrenal. Medical definitions for ad (3 of 3)-ad suff.In the direction of; toward:cephalad. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. |
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