Co Definition

abbreviation
Care of.
Webster's New World
Carried over.
Webster's New World
Cash order.
American Heritage
Corinthians.
Webster's New World
Company.
Webster's New World
prefix
Together; joint; jointly; mutually.
Coeducation.
American Heritage
Partner or associate in an activity.
Coauthor; cofounder.
American Heritage
Subordinate or assistant.
Copilot.
American Heritage
To the same extent or degree.
Coextensive.
American Heritage
Complement of an angle.
Cotangent.
American Heritage
symbol
Cobalt.
Webster's New World
affix
Together.
Coact.
Webster's New World
Mutually, equally.
Coextensive.
Webster's New World
Joint or jointly.
Copilot, coauthor.
Webster's New World
Complement of.
Cosine.
Webster's New World
noun

(slang) Company.

Wiktionary
Carbon dioxide.
Wiktionary
(derogatory) Church of Scientology.
Wiktionary
Synonyms:
pronoun

(neologism, nonstandard) They (singular). Gender-neutral subject pronoun, coordinate with gendered pronouns he and she.

Wiktionary

(neologism, nonstandard) Them (singular). Gender-neutral object pronoun, coordinate with gendered pronouns him and her.

Wiktionary

Origin of Co

  • var of com-, orig. occurring only before a vowel, h, or gn

    From Webster's New World College Dictionary, 5th Edition

  • Middle English from Latin variant of com- com-

    From American Heritage Dictionary of the English Language, 5th Edition