co

C3O1
UK/kəʊ/US/koʊ/

pronoun

Gender-neutral subject pronoun, coordinate with gendered pronouns he and she.

Similar
carbon monoxidecarbon monoxide gasconscientious objectorcobaltatomic number 27
Very commonScrabble 4

Meanings

co1

nounco (plural cos)

plural cos · alternative co. · alternative Co · alternative Co.

  1. abbreviationclippingcolloquialClipping of company.

co2

pronounco (third-person singular, gender-neutral, reflexive coself)

reflexive coself

  1. gender neutralnonstandardsingularthird personGender-neutral subject pronoun, coordinate with gendered pronouns he and she.

    Co consistently does less than cos share of the Community work. 4. Co absents coself from the Community for more than three weeks [...]

    1983, Ingrid Komar, Living the Dream: A Documentary Study of Twin Oaks Community
    2 more examples

    At the very least, an individual might have to use different terms to describe coself in a heterosexual context than co uses in a sexual minority context and different terms in a Euro-American cultural context than in other racial and ethnic contexts.

    1996, Beemyn, Brett; Elianon, Mickey, Queer studies: A Lesbian, Gay, Bisexual, and Transgender Anthology, page 74

    A youngster of my own introduction had been rejected by an object of preadolescent craving and had killed coself by leaping at the ceiling of co's quarters. Co was a rising Large Game star, her spring was powerful, our gravity flux was low - co's head struck the surface with enough force to kill on impact.

    2004 April 1, Pieira dos Lobos, “Fern's Story two”, in alt.magick.serious (Usenet)
  2. gender neutralnonstandardsingularthird personGender-neutral object pronoun, coordinate with gendered pronouns him and her.

CO3

proper noun
  1. abbreviationAbbreviation of Colorado: a state of the United States.
noun
  1. abbreviationAbbreviation of county.
  2. abbreviationinitialismgovernmentInitialism of commanding officer.
  3. abbreviationinitialismgovernmentInitialism of commissioned officer.
  4. USabbreviationinitialismgovernmentInitialism of corrections officer or initialism of correctional officer.
  5. abbreviationinitialismgovernmentInitialism of conscientious objector.
  6. abbreviationinitialismlifestyleInitialism of clothing optional.
  7. abbreviationinitialismgeographyInitialism of common-offset method.
  8. abbreviationcard gamesAbbreviation of cutoff.
verb
  1. abbreviationbusinessAbbreviation of cast on.

Co4

nounCo (uncountable)

alternative co · alternative co. · alternative Co.

  1. abbreviationuncountableAbbreviation of company, alternative form of Co..
  2. abbreviationuncountableAbbreviation of county, alternative form of Co..

    Under McGlinchey's leadership, the INLA committed several atrocities and murders during the Troubles, resulting in the Co Derry native's imprisonment both north and south of the border.

    2023 August 1, “Son of slain republicans brings actions”, in The Irish Times, page 4
  3. abbreviationuncountableAbbreviation of cotton.

Synonyms & antonyms

nounan odorless very poisonous gas that is a product of incomplete combustion of carbon

Similar
carbon monoxidecarbon monoxide gas
Broader

nounone who refuses to serve in the armed forces on grounds of conscience

nouna hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition

Similar
cobaltatomic number 27
Broader
metallic elementmetal

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

co · pronoun

Coined by feminist writer Mary Orovan in 1970; in common usage in intentional communities of the Federation of Egalitarian Communities.

Full word history & related roots →

Rhymes & wordplay

Rhymes with co

All rhymes →
Cite this entry
APA

co. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/co

MLA

“co.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/co. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “co,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/co.

Source: co on Wiktionary, CC BY-SA 4.0.