attachmentat·tach·ment /əˈtætʃmənt/ noun1[countableC, uncountableU]LAW when part of someone’s earnings or money that is owed to them is taken by a court and used to pay their debtsOrganizations can apply to have an attachment of earnings made on someone who owes them money.
2[countableC] a piece of paper fastened to a document such as an insurance agreement, which shows a special condition of the agreement
3[countableC]COMPUTING a document which is sent as part of an EMAIL messageYou can send me the spreadsheet as an attachment.