define carbon copy
In e-mail, a carbon copy (abbreviated cc, and sometimes fcc for first carbon copy) is a copy of a note sent to an addressee other than the main addressee. A blind carbon copy is a copy sent to an addressee that is not visible to the main and carbon copy addressees. For example, you may have a work colleague that acts as a back-up when you're on vacation or not at work. You don't necessarily want the people you correspond with to know that you have a back-up.