ad
/æd/ (bre, ipa) · [ˈæd] /æd/ (ame, ipa) · [ˈæd] /ˈad/ (ame, mw)
ad — noun
- adsingular
- adsplural
1. an informal word for a notice, picture, video, or message that tries to make peo
an informal word for a notice, picture, video, or message that tries to make people buy or use something
Bilal skipped the video ad before the cooking lesson began.
video ad before online content
Tanvi answered a job ad from a small design studio.
job ad in a hiring context
A bright ad for winter coats covered the bus stop wall.
Lisa laughed at the ad that promised perfect skin in a week.
- advertisement
the full, neutral form used in both formal and informal English
- commercial
usually a paid video or radio advertisement rather than any kind of ad
- promotion
broader, and can also mean a sales offer or marketing activity
文法句型
an ad
see an ad
answer an ad
用法筆記
This sense usually means one piece of advertising, such as a poster, video, or printed notice. For the field or business of making promotions, sense 3 is more natural.
常見錯誤
2. an informal word for the work or business of making messages that promote produc
an informal word for the work or business of making messages that promote products or services
Reema wants to work in ad after finishing her design course.
work in ad = work in advertising
People in ad often work closely with photographers and copywriters.
Liam stayed in ad for ten years before opening a bakery.
After college, Daichi found a job in ad at a sports brand.
- advertising
the standard full word for the industry or activity
- marketing
broader, covering strategy and sales work beyond making ads
- promotion
broader, and can refer to publicity work rather than the whole industry
文法句型
work in ad
be in ad
a job in ad
用法筆記
This short form belongs to informal workplace talk. In more careful writing, people usually say or write 'advertising' instead.
常見錯誤
ad — abbreviation
1. written with a year to show that the date is counted from the traditional year o
written with a year to show that the date is counted from the traditional year of Christ's birth
The museum label said the coin was made in AD 117.
AD + year on a historical label
In class, Esteban placed AD 476 at the end of the empire.
The chart compared life in AD 50 with life today.
The history book uses AD before some years and CE in others.
- CE
a modern alternative label for the same era, without the Christian wording
- BC
marks years before this era in the traditional system
文法句型
AD + year
in AD + year
用法筆記
AD usually appears before the year number in English. Many modern history books now use CE instead, but both labels point to the same historical period.
常見錯誤
2. a short written form of Alzheimer's disease, used especially in medical notes, r
a short written form of Alzheimer's disease, used especially in medical notes, research, or care services
The report listed early AD among the conditions studied at the clinic.
AD in research or medical reporting
Mayumi joined an AD support group after her father's diagnosis.
The nurse explained that AD slowly affects memory and daily tasks.
A poster about AD care hung beside the waiting room door.
- Alzheimer's disease
the full form, clearer for general readers and everyday use
文法句型
early AD
AD care
AD support group
用法筆記
Outside specialist writing, people usually say or write the full disease name. The short form AD is most common in charts, research papers, and service names.