noun
Refers to a duplicate made using carbon paper, or figuratively to an exact copy. In modern contexts, often used in email (CC).
この書類のカーボンコピーを取ってください。
Please make a carbon copy of this document.
メールのカーボンコピーに彼のアドレスを入れた。
I put his address in the CC of the email.
Variant with interpunct; less common in everyday use.
コピー is a general copy, while カーボンコピー specifically refers to a carbon copy or an exact duplicate.
Loanword from English 'carbon copy'.