Overview of noun a.d.

The noun ad has 1 sense

• ad, advertisement, advertizement, advertising, advertizing, advert -- (a public promotion of some product or service)

Overview of adv a.d.

The adv a.d. has 1 sense

• AD, A.D., anno Domini -- (in the Christian era; used before dates after the supposed year Christ was born; "in AD 200")