1an extra part or extension that is or may be attached to something to perform a particular function:the processor comes complete with a blender attachment
a computer file appended to an email.
2 [mass noun] affection, fondness, or sympathy for someone or something:she felt a sentimental attachment to the place creep over her
[count noun] an affectionate relationship:he formed an attachment with a young widow
3British temporary secondment to an organization:the students are placed on attachment to schools for one day a week
4 [mass noun] the action of attaching something:the case has a loop for attachment to your waist belt
legal seizure of property.
attachment of earnings
English Law payment of debts by direct deduction from the debtor’s earnings, under a court order.