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• Co
  Co

  cobalt.
• CO
  CO

  abbreviation

  Colorado (approved especially for use with zip code).
• Co.
  Co.

  abbreviation

  Company.
• c/o
  c/o

  care of.
• C/o
  C/o

  care of.
• C/O
  C/O

  cash order.
• 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 ).
• c.o.
  c.o.

  abbreviation

  care of.
• C.O.
  C.O.

  abbreviation

  cash order.
• co
  co

  abbreviation

  a commercial company (used with a country domain name)

Co

¹ American  

Symbol, Chemistry.

1. cobalt.

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CO ² American  

abbreviation

1. Colorado (approved especially for use with zip code).

2. commanding officer.

3. conscientious objector.

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Co. ³ American  

Or co.

abbreviation

1. Company.

2. County.

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c/o ⁴ American  

1. care of.

2. Bookkeeping. carried over.

3. cash order.

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C/o ⁵ American  

1. care of.

2. Bookkeeping. carried over.

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C/O ⁶ American  

1. cash order.

2. certificate of origin.

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co- ⁷ American  

1. 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. ⁸ American  

abbreviation

1. care of.

2. carried over.

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C.O. ⁹ American  

abbreviation

1. cash order.

2. Commanding Officer.

3. conscientious objector.

4. correction officer.

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CO ¹ British  

abbreviation

1. Commanding Officer

2. Commonwealth Office

3. conscientious objector

4. Colorado

5. Colombia (international car registration)

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co- ² British  

prefix

1. together; joint or jointly; mutual or mutually

   coproduction

2. indicating partnership or equality

   cofounder

   copilot

3. to the same or a similar degree

   coextend

4. (in mathematics and astronomy) of the complement of an angle

   cosecant

   codeclination

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Co ³ British  

abbreviation

1. (esp in names of business organizations) Company

2. informal and the rest of them

   Harold and co

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c/o ⁴ British  

abbreviation

1. care of

2. accounting carried over

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co ⁵ British  

abbreviation

1. a commercial company (used with a country domain name)

2. Colombia

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Co ⁶ British  

symbol

1. cobalt

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Co ⁷ British  

abbreviation

1. County

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Etymology

Origin of co-

from Latin, reduced form of _com-

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Example Sentences

See Examples For:

Co CO Co. c/o C/o C/O co- c.o. C.O. co

“We’re looking at how we can fit these companies into our existing workflows and help expedite that,” said David Min, vice president of innovation at the Walt Disney Co.

From Los Angeles Times ● Nov. 3, 2026

The genre has become a staple of the podcast industry, which took in $9.2 billion in global revenue last year, according to media consulting firm Owl & Co.

From Los Angeles Times ● Oct. 28, 2026

Victoria's Secret created this year's Fantasy Bra in collaboration with jewellery brand Jacob & Co, who said it was the "most valuable" one ever created and took 15 artists more than 1,000 hours to create.

From BBC ● Oct. 19, 2026

They will also be looking to the results of Taiwan Semiconductor Manufacturing Co.

From MarketWatch ● Oct. 14, 2026

Just inside, a note identifying the publisher as R. L. Polk & Co, the name everyone uses when they talk about the compendium of businesses and people.

From "The Brightwood Code" by Monica Hesse

Images of Air Force One parked at the Turkish airport show vehicles labeled with the logo of a catering company called Turkish DO & CO.

From The Wall Street Journal ● Aug. 13, 2026

Because CO chondrites contain relatively little sulfur, the new evidence suggests that sulfur from the meteorite itself may not have been the main driver of the catastrophe.

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

As he stood and turned, the CO at the table who had earlier told me to take it easy signaled me to relax.

From "Newjack: Guarding Sing Sing" by Ted Conover

Ippolito called the company, only to find out that it had been acquired in December by Wedding Gown Preservation Co. “and apparently with that, all of their files are gone.”

From Los Angeles Times ● Nov. 5, 2026

The company has agreed to form a joint venture with Taiwan Semiconductor Manufacturing Co. to produce next-generation image sensors for smartphones, with the companies planning to invest a combined $4.7 billion.

From The Wall Street Journal ● Nov. 5, 2026

OpenAI plans to buy Pierre Computer Co., the company behind the code management system Code Storage and other open-source tools for developers.

From The Wall Street Journal ● Nov. 4, 2026

That same neighbor tipped her off to Asher’s Chocolate Co., an 1892-founded, fifth-generation sweets company in Pennsylvania.

From Los Angeles Times ● Oct. 27, 2026

It cost five dollars from the Talking Machine Department at Sears, Roebuck and Co., and he’d ordered a dozen “best and loudest music records” to play on it.

From "Cold Sassy Tree" by Olive Ann Burns

For some time afterward, envelopes containing dollar bills made their way to “Viva Superstar, c/o The Chelsea Hotel.”

From New York Times ● Apr. 28, 2023

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

Donations may be made online at www.miap.us or mailed to Missing in America Project, c/o John Hundahl, 1507 S. Quillan St., Kennewick, WA 99338.

From Seattle Times ● Apr. 10, 2018

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

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 Sir Ian Hamilton

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

Nadiem has gained a large following as the co- founder of one of Indonesia's most successful tech companies.

From BBC ● Jun. 30, 2026

“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

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

And I don’t want to give up the fun I have with my co- workers, especially Don Lucho with his gold tooth.

From "The Queen of Water" by Laura Resau

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

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

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

But last week Florida educational authorities were comparably steamed up about a c.o. teacher.

From Time Magazine Archive

Last week he got the Board to order the trial of a c.o. for incompetence.

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

An older, more-seasoned lifeboat pilot, future station C.O.

From Seattle Times ● Aug. 18, 2019

As for the carbon monoxide, he said, “It was high. Had this not happened, I would have told my client, ‘You need to get your C.O. fixed.’”

From New York Times ● Mar. 24, 2017

That meant Engel had gone to get the car out of the garage so she can take the Gestapo captain to meet his dreadful C.O.

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

Ancelotti ticks that box: a record five Champions League titles and trophies in all five of Europe's major leagues carry real weight, even in a dressing room featuring Neymar, Vinicius Jr, Raphinha and co.

From BBC ● Jun. 1, 2026

Liverpool's season to forget may have finished last week but the problems continue for Slot and co.

From BBC ● May 29, 2026

D i s co m f It/d I s co m Fo RT.

From "Woe Is I" by Patricia T. O'Conner

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