noun, noun or participle which takes 'suru', transitive verb, noun which may take the genitive case particle 'no'
enclose; include in the same envelope
Used when putting something inside the same envelope or package as another item, typically a letter. Often appears as 同封する or 同封の.
履歴書に写真を同封してください。
Please enclose a photo with your résumé.
同封の書類
Please sign the enclosed documents.