Co
cobalt.
Jump To:
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Co
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CO
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Co.
Co.abbreviationCompany.
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c/o
c/ocare of.
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C/o
C/ocare of.
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C/O
C/Ocash order.
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co-
co-variant of com- before a vowel, h, and gn: coadjutor; cohabit; cognate . The prefix co- now productively forms new words from bases beginning with any sound (co-conspirator; co-manage; coseismic ), sometimes with the derived sense “auxiliary, subsidiary” (coenzyme; copilot ), and, in mathematics and astronomy, with the sense “complement” (codeclination ).
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c.o.
c.o.abbreviationcare of.
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C.O.
C.O.abbreviationcash order.
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co
coabbreviationa commercial company (used with a country domain name)
Co
1 AmericanSymbol, Chemistry.
CO
2
American
Co.
3
American
Or
co.
abbreviation
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Company.
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County.
c/o
4
American
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care of.
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Bookkeeping. carried over.
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cash order.
C/o
5
American
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care of.
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Bookkeeping. carried over.
C/O
6
American
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cash order.
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certificate of origin.
co-
7
American
c.o.
8
American
abbreviation
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care of.
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carried over.
C.O.
9
American
abbreviation
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cash order.
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Commanding Officer.
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conscientious objector.
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correction officer.
CO
1
British
abbreviation
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Commanding Officer
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Commonwealth Office
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conscientious objector
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Colorado
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Colombia (international car registration)
co-
2
British
prefix
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together; joint or jointly; mutual or mutually
coproduction
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indicating partnership or equality
cofounder
copilot
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to the same or a similar degree
coextend
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(in mathematics and astronomy) of the complement of an angle
cosecant
codeclination
Co
3
British
abbreviation
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(esp in names of business organizations) Company
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informal and the rest of them
Harold and co
c/o
4
British
abbreviation
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care of
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accounting carried over
co
5
British
abbreviation
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a commercial company (used with a country domain name)
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Colombia
Co
6
British
symbol
Co
7
British
abbreviation
Etymology
Origin of co-
from Latin, reduced form of com-
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:
The 2026 model year will be the last for Honda’s Prologue SUV, said Lance Woelfer, the vice president of automobile sales for American Honda Motor Co.
From The Wall Street Journal ● Jul. 16, 2026
Two days after the Summer of Ludd ended, private jets and helicopters descended on Jackson Hole, Wyoming, to herald the start of the Allen & Co.
From Salon ● Jul. 13, 2026
Threave, Dumfries and Galloway recorded Scotland's highest temperature of 29.7C, while the highest temperature in Northern Ireland peaked at 27.4C in Killowen, Co.
From BBC ● Jul. 11, 2026
At that rate, Musk’s chip-making venture would be growing at the same rate as Taiwan Semiconductor Manufacturing Co.
From MarketWatch ● Jul. 7, 2026
He had planned on riding a bicycle, just to be funny, and even went so far as to order one from Sears, Roebuck and Co.
From "Cold Sassy Tree" by Olive Ann Burns
CO chondrites, also called carbonaceous chondrites of the Ornans class, represent only a very small portion of that group.
From Science Daily ● Jul. 19, 2026
Pennington's hometown was Glendale, Kentucky, and he was assigned to the 1st Space Battalion, 1st Space Brigade out of Fort Carson, CO.
From Barron's ● Mar. 10, 2026
“What Eric voted for was a resolution to condemn a horrific antisemitic attack in Boulder, CO that killed Karen Diamond, an 82-year old grandmother,” a campaign spokesman said in a statement.
From Los Angeles Times ● Jan. 28, 2026
"They sat in a building inhaling fatal levels of carbon monoxide which we have been told but for 'sheer luck' there was no fatalities due to the high level of CO detected," she said.
From BBC ● Nov. 20, 2025
“You gonna think back on this in twenty years, CO, and you gonna be ashamed of yourself.”
From "Newjack: Guarding Sing Sing" by Ted Conover
OpenAI launched a standalone services firm called OpenAI Deployment Co. and invested $150 million in a new enterprise partner program.
From The Wall Street Journal ● Jul. 22, 2026
TPG led a $4 billion investment in OpenAI Deployment Co., which will remain majority-owned by OpenAI.
From The Wall Street Journal ● Jul. 22, 2026
Last week, contract chip maker Taiwan Semiconductor Manufacturing Co. announced an additional $100 billion investment in Arizona.
From The Wall Street Journal ● Jul. 22, 2026
The approved buyer of the mothballed residential, hotel and retail project is a partnership led by Kali P. Chaudhuri, whose KPC Development Co. owns and builds commercial properties in California and India.
From Los Angeles Times ● Jul. 21, 2026
Mr. Kleiman has taken over Opekta, and Mr. Kugler, Gies & Co., the company dealing in spices and spice substitutes that was set up in 1941.
From "The Diary of a Young Girl" by Anne Frank
By filling out a form online or downloading the claim form and then mailing it to Facebook Consumer Privacy User Profile Litigation, c/o Settlement Administrator, 1650 Arch Street, Suite 2210, Philadelphia, PA 19103.
From Los Angeles Times ● Apr. 18, 2023
From lesser-known labels such as Vetements, Off-White c/o Virgil Abloh and Yang Li to global companies such as Dries Van Noten, Rick Owens, Prada and Maison Margiela, luxury now comes with unfinished hems.
From Washington Post ● Apr. 7, 2015
Contact Getting Around at [email protected] or c/o the Chicago Tribune, 435 N. Michigan Ave., Chicago, IL 60611; on Twitter @jhilkevitch; and at facebook.com/jhilkevitch.
From Chicago Tribune ● Dec. 14, 2014
Write to them c/o King Features Syndicate, 300 W. 57th St., 15th floor, New York, NY 10019, or via their website: .
From Seattle Times ● Apr. 25, 2012
You may return expense advance to Lovelace Foundation c/o me.
From "Women in Space" by Karen Bush Gibson
As I have only four weeks in which to complete my work here and get to London a 'collect reply by cable to C/o Colonel Sellheim, Australian Intermediate Base, Cairo, would greatly oblige.
From Gallipoli Diary, Volume 2 by Hamilton, Ian, Sir
The box was a gift from Felix Hoffmann, chief curator at C/O Berlin gallery, which he made in 2013.
From The Wall Street Journal ● Nov. 3, 2015
His personal project, Anniversaries, will be exhibited at C/O Berlin from June 20 to August 16.
From Time ● Jun. 5, 2015
Freeze frame … the C/O Gallery focuses on photography.
From The Guardian ● Aug. 17, 2011
C/O was thus founded to rectify Berlin’s undervaluing of art photography.
From New York Times ● Dec. 26, 2010
A decade later, the scene has since caught up — though C/O remains at the epicenter, having shown the likes of Robert Frank and Nan Goldin.
From New York Times ● Dec. 26, 2010
“Happy Father’s Day to my baby daddy and rad co- parent,” she captioned a pair of family photos.
From Los Angeles Times ● Nov. 4, 2025
The Bad Boy Records co- founder waved to his supporters as he appeared in court again on Thursday.
From BBC ● Sep. 25, 2025
He added, "We are committed to advancing our efforts to transform the prospect of a universal treatment, capable of controlling co- and serial infections of respiratory viruses and bacteria, into a reality."
From Science Daily ● Mar. 18, 2024
“The Yamnaya are extraordinary,” says the study’s co- author Volker Heyd, an archaeologist at the University of Helsinki.
From Scientific American ● Mar. 3, 2023
NOTE.—The forms co-, col-, com-, and cor-, are euphonic variations of con-.
From New Word-Analysis by William Swinton
It seemed significant that our hero came clean about killing his c.o., the darkest element of Don Draper’s origin story, after initially lying about his rank.
From Slate ● May 11, 2015
The Selective Service Act makes it unmistakably clear that no one is to be exempted from the draft as a c.o. unless he holds to a "belief in a relation to a Supreme Being."
From Time Magazine Archive
Last week he got the Board to order the trial of a c.o. for incompetence.
From Time Magazine Archive
He had said that his "humanitarian beliefs" forbade him to bear arms, but lost an appeal to the President for classification as a c.o.
From Time Magazine Archive
A New Yorker of draft age, Seeger claimed exemption as a conscientious objector, but he was an unusual sort of c.o.
From Time Magazine Archive
Alec Ginsberg, a fourth-generation pharmacist who owns C.O.
From MarketWatch ● Jul. 23, 2026
Instead, it was “so many people screaming, screaming to talk to each other. Screaming for assistance: ‘Yo, C.O., my toilet flooded.
From Slate ● May 19, 2025
“Bud” Adams Jr.; television executive and producer Roone Arledge; longtime Oilers/Titans scout C.O.
From Seattle Times ● Jul. 7, 2022
“A C.O. had told me that I was never going home and that really got to me,” he said of one occasion.
From New York Times ● Dec. 17, 2021
And she rang her C.O. to let him know she had been asked to taxi one of her usual passengers from RAF Special Duties to an “Undisclosed Location.”
From "Code Name Verity" by Elizabeth Wein
Iraola and co head back to their base in Chicago with a win under their belt but well aware that this is just the start.
From BBC ● Jul. 26, 2026
Associate Professor Nic Rawlence, Director of the Otago Palaeogenetics Laboratory, is a co author of the new study, which investigates the fossil and its evolutionary relationships.
From Science Daily ● Jul. 11, 2026
Vinicius Jr. and co topped Group C - knocking out Scotland in the process - but were unconvincing on the one occasion they were truly tested, drawing 1-1 with Morocco in their opening fixture.
From BBC ● Jun. 28, 2026
It's just that he was up against Lionel Messi and co…
From BBC ● Jun. 11, 2026
D i s co m f It/d I s co m Fo RT.
From "Woe Is I" by Patricia T. O'Conner
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.
