Co Definition
 kō 
    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: 
  - carbon monoxide gas
 - carbon-monoxide
 - cobalt
 - atomic number 27
 - conscientious objector
 - centennial-state
 - colorado
 
    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





