Definition of Co

Prefix: co-  kow

1. Together, with, joint

1. A hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
   - cobalt, atomic number 27

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

1. An odourless very poisonous gas that is a product of incomplete combustion of carbon
   - carbon monoxide, carbon monoxide gas
    
2. A state in west central United States in the Rocky Mountains
   - Colorado, Centennial State
    
3. One who refuses to serve in the armed forces on grounds of conscience
   - conscientious objector

See also:
Cnut
coacervate

Anagrams containing the word co

co oc