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Noun: CO
  1. One who refuses to serve in the armed forces on grounds of conscience
    - conscientious objector
     
  2. An odourless very poisonous gas that is a product of incomplete combustion of carbon
    - carbon monoxide, carbon monoxide gas
     
  3. A state in west central United States in the Rocky Mountains
    - Colorado, Centennial State
Prefix: co-  kow
  1. Together, with, joint
Preposition: c/o
  1. (mail) to be delivered to (e.g. the address of someone who will then give the delivery to the intended recipient)
    "Please mail this to John, c/o his mother";
    - care of
Noun: Co
  1. A hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
    - cobalt, atomic number 27

Derived forms: COs, Cos

Type of: American state, contestant, dissenter, dissident, metal, metallic element, monoxide, objector, protester, protestor

Part of: America, cobaltite, smaltite, the States, U.S., U.S.A., United States, United States of America, US, USA

Encyclopedia: CO

Co