ac
abbreviation
acre; acres.
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ac
1 Americanabbreviation
Ac
3
American
Symbol, Chemistry.
AC
4
American
abbreviation
Electricity.
A/C
5
American
[ey-see]
/ ˈeɪˈsi /
Also
AC,
or
a/c
abbreviation
A/C
6
American
Or
a/c
ac-
7
American
-ac
8
American
a.c.
9
American
abbreviation
A.C.
10
American
abbreviation
A.C.
11
American
abbreviation
-
Army Corps.
-
Athletic Club.
a.c.
1
British
abbreviation
AC
2
British
abbreviation
-
alternating current Compare DC
-
ante Christum
-
Air Corps
-
athletic club
-
Companion of the Order of Australia
-
appellation d'origine contrôlée: the highest French wine classification; indicates that the wine meets strict requirements concerning area of production, strength, etc See VDQS vin de pays vin de table
-
Aelodau'r Cynulliad: Member of the Assembly (that is, the National Assembly of Wales)
ac
3
British
abbreviation
A/C
4
British
abbreviation
a/c
5
British
abbreviation
-
account
-
account current
Ac
6
British
symbol
AC
Scientific
Etymology
Origin of -ac8
From Latin -acus, from Greek -akos
Origin of a.c.9
From Latin ante cibum
Origin of A.C.10
From Latin ante Christum
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Our Welsh language friends can start listening to the big match build-up now by using the Carl ac Alun link above.
From BBC ● Mar. 25, 2024
He was a very well-known, established character ac even before "I Love Lucy."
From Fox News ● Jun. 5, 2021
The Multiplication Property of Equality—For any numbers a, b, and c, if a = b , then ac = bc .
From Textbooks ● Apr. 22, 2020
Comparing not having A/C to 100 years ago when there was no ac is not a fair comparison.
From New York Times ● Aug. 15, 2016
Ngawang Doka replied in clear, sparkling English that carried a hint of a Canadian ac cent.
From "Into Thin Air" by Jon Krakauer
Balcarcel’s attorney, Samuel Simpson V, said Monday that he would be “very surprised” if Balcarcel Ac and Alvarado-Dubon were planning a mass shooting.
From Seattle Times ● Jul. 11, 2022
The affidavit was used to obtain a warrant to search a home in Richmond where Balcarcel Ac lived with a second man who was also arrested in connection with the alleged plot, Julio Alvarado-Dubon, 52.
From Seattle Times ● Jul. 8, 2022
Even to copy a relatively short paper, “Proc Nat Ac Sci”—“Proceedings of the National Academy of Sciences”—could take the better part of an hour.
From The New Yorker ● Jan. 6, 2020
Actinium, Ac, is the first member of the fourth transition series, which also includes Rf through Rg.
From Textbooks ● Feb. 14, 2019
Ac si láge sóne adiligde. þurh unwreaste leahtrum ⁊ manifald sénne.
From Selections from early Middle English, 1130-1250 Part I: Texts by Joseph Hall
The AC in my car was on the fritz and I arrived red faced and sweaty.
From Los Angeles Times ● Aug. 11, 2026
They complete their pre-season programme against Amorim's new club AC Milan in Wroclaw on 15 August, when Rashford could make his first United appearance since December 2024 if Carrick decides Wednesday is too soon.
From BBC ● Aug. 8, 2026
Americans need their AC this cold to sleep.
From MarketWatch ● Aug. 5, 2026
AC Milan will pay tribute to their former captain ahead of their friendly match again Inter on Wednesday.
From BBC ● Aug. 4, 2026
Every AC Transit bus is equipped with cameras that continuously record sound and video from multiple vantage points.
From "The 57 Bus" by Dashka Slater
Older APOE2 knock-in mice had smaller nucleoli, higher levels of the nuclear scaffolding protein Lamin A/C, and better-preserved heterochromatin in the hippocampus than mice carrying APOE3 or APOE4.
From Science Daily ● Jul. 24, 2026
Appeared in the July 25, 2026, print edition as 'Notable & Quotable: A/C'.
From The Wall Street Journal ● Jul. 24, 2026
A team led by Hong Kong researchers recently created an A/C alternative that achieved a cooling power of 1,284W—the first time an elastocaloric device surpassed the 1,000W mark.
From BBC ● May 19, 2025
Instead, it is important for neighbors to check on one another, and for city services to provide people with community-oriented resilience centers that offer more than just A/C or water.
From Los Angeles Times ● Aug. 26, 2024
Roy waited inside for a while, but without A/C it was unbearably hot and sticky.
From "Hoot" by Carl Hiaasen
Still, with the prices of many commodities climbing, the companies couldn’t ac- commodate price shocks, so they often wound up hiring banks to hedge their vulnerability to volatile product markets.
From MSNBC ● Jun. 4, 2014
“I suppose the problem at the moment is that we don’t have a one- to-one mapping, because even our best theories aren’t completely ac- curate,” Ladyman said.
From Scientific American ● Jan. 31, 2014
Very democratic, proud of being a plain American, she likes people, is always ac- cessible to strangers.
From Time Magazine Archive
She is all that is artistic without being vulgar and is the one ac- tress today who can wink without being suggestive.
From Time Magazine Archive
NOTE.—The forms ac-, af-, etc., are euphonic variations of ad-, and follow generally the rule that the final consonant of the prefix assimilates to the initial letter of the root.
From New Word-Analysis by William Swinton
NOTE.—The suffix -ac is found only in Latin derivatives of Greek origin.
From New Word-Analysis by William Swinton
A new report finds that about 3% of autos--high- and low-end models--have fungi and bacteria breeding in the moisture that collects on the a.c.
From Time Magazine Archive
Power.—A transformer for stepping down a commercial alternating current for lighting and heating the filament and for stepping up the commercial a.c., for charging the plate of a vacuum tube oscillator.
From The Radio Amateur's Hand Book by A. Frederick (Archie Frederick) Collins
The 60 h.p. has parallel a.c. cylinders, the other two are radial w.c.
From Jane's All the World's Aircraft 1913 by Various
These writings are said to date from about 97 to 150 a.c.
From Frauds and Follies of the Fathers A Review of the Worth of their Testimony to the Four Gospels by Joseph Mazzini Wheeler
In the third century a.c. he composed in Greek a history of his native land, which has perished.
From Myths of Babylonia and Assyria by Donald Alexander Mackenzie
Other historical Pasadena figures in the book include the bookseller A.C.
From The Wall Street Journal ● Feb. 27, 2026
And Hoecht, along with defensive line coach Giff Smith and assistant A.C.
From Los Angeles Times ● Nov. 22, 2024
But the filmmaking team is fairly confident it belongs to Irvine, due to the sock found inside the boot being embroidered with the words "A.C. Irvine".
From BBC ● Oct. 11, 2024
The Hare Krishna movement evolved from a 16th-century Indian tradition, and exploded as a worldwide phenomenon when a charismatic Hindu guru known as A.C.
From New York Times ● May 22, 2024
Pending the arrival of the French, Sir Horace was ordered by the C. in C. to send up to their assistance every available man from the 2nd A.C., which was recouping at Pradelles.
From The First Seven Divisions Being a Detailed Account of the Fighting from Mons to Ypres by Ernest W. Hamilton
Chris Coucheron-Aamot, a guest at the Sandals resort, wrote on Facebook that the cause of the episode “may have been a fault with the a/c in the unit, causing a toxic coolant leak.”
From Seattle Times ● May 9, 2022
The a/c is just about coping but I am dreading the operating list this afternoon.
From The Guardian ● Jul. 24, 2019
People with no a/c had access to open windows and the wind.
From New York Times ● Aug. 15, 2016
Everyone drives huge SUVs, the houses have no insulation, heating on all winter, a/c on all summer, landfills are overflowing, you get punished for reusing shopping bags.
From BBC ● Jul. 10, 2011
Was two hours late getting in to Chicago on a/c freight wreck and missed seeing Kuhner his sister's daughter gets married and Kuhner goes to the wedding.
From Potash & Perlmutter Their Copartnership Ventures and Adventures by Montague Glass
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
