1. In the chronological method of A.D., after A.D., the whole writing after A.D. is abbreviated as A.D., which corresponds to B.D. before Christ.
Second, the common meaning of AD is advertising (as the name implies, it is widely advertised, that is, telling the general public something): advertising or AD for short. This is the most commonly used in reality.
Third, the representative occupation: AD
In addition, we often see ad in English textbooks. This is the abbreviation of adverb (adv), which means adverb. It refers to the words that express the characteristics of behavior or state in a sentence, which are used to modify verbs, adjectives, other adverbs or the whole sentence and express concepts such as time, place, degree and way.
In addition, AD can also be: personal name abbreviation, English abbreviation of Andorra, administrative distance, applied defense system, English abbreviation, Alzheimer's disease, network engineering terminology, adrenaline, website security detection software, Italian audio brand, advertising distance, English abbreviation of university admission notice, MOBA game terminology, high-definition disc player, activity directory, and job title.
Abbreviations for Active Directory directory service, aggregate demand curve, Jedi counterattack, tennis terms, civil aviation terms, circuit terms, jewelry brands, etc.