From Longman Dictionary of Contemporary Englishcccc /ˌsiː ˈsiː/ 1 (carbon copy to) used in a business letter or email to show that you are sending a copy to someone else To Neil Fry, cc: Anthea Baker, Matt Fox2 TMthe abbreviation of cubic centimetre or cubic centimetres a 200 cc engineFrom Longman Business Dictionarycccc1 COMPUTINGused on letters, documents, and E-MAILs to show that a copy has also been sent to someone in addition to the person to whom it is addressedTo Neil Fry, cc Anthea Baker, Matt Foxcccc2 verb [transitive] informalCOMPUTING to send a copy of a letter, document, or E-MAIL addressed to one person to another personCan you send a memo to Bill and cc it to the sales team.