noun

• Abbreviation of Colorado. A state of the United States. [A major river of western North America, running from the Rocky Mountains in the United States to the Gulf of California in Mexico.]
• Abbreviation of county. [An administrative or geographical region of various countries, including Bhutan, Canada, China, Croatia, Ireland, Japan, New Zealand, Norway, Poland, Romania, South Korea, Sweden, the United Kingdom, and 48 of the 50 United States (excluding Alaska and Louisiana).]
• (military) Initialism of commanding officer. [The officer in command of, and typically having ultimate authority over, a military unit.]
• (military) Initialism of commissioned officer. [(military) An officer who derives authority directly from a sovereign power and, as such, holds a commission charging them with the duties and responsibilities of a specific office or position.]
• (US, law enforcement) Initialism of corrections officer. [A jailer.]
• (US, law enforcement) Initialism of correctional officer.
• (military) Initialism of conscientious objector. [Someone who refuses to perform military service (for example to fight in an armed conflict, or be compulsorily drafted in a time of peace) because of religious or moral principles.]
• (geology) Initialism of common-offset [method].
• (poker) Abbreviation of cutoff. [The point at which something terminates or to which it is limited.]
• (colloquial) Clipping of company. [A team; a group of people who work together professionally.]
• Abbreviation of company, alternative form of Co. [A team; a group of people who work together professionally.]
• Abbreviation of county, alternative form of Co. [An administrative or geographical region of various countries, including Bhutan, Canada, China, Croatia, Ireland, Japan, New Zealand, Norway, Poland, Romania, South Korea, Sweden, the United Kingdom, and 48 of the 50 United States (excluding Alaska and Louisiana).]
• Abbreviation of cotton. [Gossypium, a genus of plant used as a source of cotton fiber.]