carbon copy noun 3verb 2forms 4 noun3 •A copy produced in an alternated stack of ordinary sheets of paper and carbon papers. The pressure applied on the top sheet (by a pen or typewriter) causes every carbon paper to release its carbon cover, thus reproducing the writing on the subjacent layers of paper.In preparing the contract, we'll make a carbon copy for our records. •A duplicate or lookalike.This new home is simply a carbon copy of the one down the street. •(Internet) A duplicate copy of an email. verb2 •To create a carbon copy of.Please carbon copy this contract for our records. •(Internet) To send a duplicate copy of an email to. formscarbon copied · carbon copying · carbon copies · carbon-copies