ad

1 of 7

noun (1)

often attributive
1
: advertisement sense 1
newspapers ads
TV ads for new cars
2
: advertising
an ad agency

ad

2 of 7

noun (2)

AD

3 of 7

abbreviation (1)

1
active duty
2
after date
3
4
Alzheimer's disease
5
anno Domini
often printed in small capitals and often punctuated
6
assembly district
7
assistant director
8
athletic director
9
right ear
used especially in audiology and in writing medical prescriptions

A/D

4 of 7

abbreviation (2)

analog/digital

ad-

5 of 7

prefix

variants or ac- or af- or ag- or al- or ap- or as- or at-
1
: to : toward
usually ac- before c, k, or q
acculturation
and af- before f
affluent
and ag- before g
aggradation
and al- before l
alliteration
and ap- before p
apportion
and as- before s
assuasive
and at- before t
attune
and ad- before other sounds but sometimes ad- even before one of the listed consonants
adsorb
2
: near : adjacent to
in this sense always in the form ad-
adrenal

-ad

6 of 7

adverb suffix

: in the direction of : toward
cephalad

-ad

7 of 7

noun suffix

: member of a botanical group
bromeliad

Examples of ad in a Sentence

Noun (1) did you see the ads in the paper for cheap round-trip flights to Florida?
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
The Disruptive Power of AI Search Right now, Gen AI search tools don’t offer pay-to-play opportunities, meaning brands cannot buy ads or pay to be mentioned. Roger Dooley, Forbes, 10 Mar. 2025 That money will go to traditional P&A, helping to make digital ads, trailers, and the costs necessary to make DCPs and the rest of the marketing campaign, all while building a network of people who want to see the project succeed. Brian Welk, IndieWire, 10 Mar. 2025 Brown says the championship game sold out months ago at rates that are comparable to NFL games, and that overall tournament ad sales are pacing nearly 200 percent above last year, an enormous increase at a moment where the overall ad business is still embracing a certain amount of austerity. Alex Weprin, The Hollywood Reporter, 10 Mar. 2025 This year, the Super Bowl was all about artificial intelligence, as Google, Meta, OpenAI, and Salesforce ran ads showing off their A.I. tools. Oren Peleg, The New Yorker, 10 Mar. 2025 See All Example Sentences for ad

Word History

Etymology

Noun (1)

by shortening

Noun (2)

by shortening

Prefix

borrowed from Latin, prefix forming verbs and verbal derivatives, marking movement toward, tendency, addition, from ad, preposition, "to, as far as, at, near, in accordance with" — more at at entry 1

Adverb suffix

borrowed from Latin ad "to, toward" — more at at entry 1

Noun suffix

borrowed from New Latin -ad-, -as, borrowed from Greek -ad-, -as, feminine noun suffix denoting descent from or connection with

First Known Use

Noun (1)

1799, in the meaning defined at sense 1

Noun (2)

1915, in the meaning defined above

Time Traveler
The first known use of ad was in 1799

Browse Nearby Words

Cite this Entry

“Ad.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ad. Accessed 13 Mar. 2025.

Kids Definition

ad

1 of 2 noun
ˈad

ad-

2 of 2 prefix
variants or ac- or af- or ag- or al- or ap- or as- or at-
: to : toward
usually ac- before c, k, or q and af- before f and ag- before g and al- before l and ap- before p and as- before s and at- before t and ad- before other sounds but sometimes ad- even before one of the listed consonants
Etymology

Prefix

Latin ad- "to, toward"

Medical Definition

AD

abbreviation
1
2
3
[Latin auris dextra] right ear
used especially in audiology and in writing medical prescriptions
4
average deviation

More from Merriam-Webster on ad

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