- noun the joining, fixing or connecting of one thing to another
- noun a device which is attached to a machine for a special purpose
- A file that is appended to an email. Such a file may be a document, an image, a video, a program, and so on. Certain types of attachments are encoded, thus requiring the recipient to have the appropriate email software to decode it. Also called email attachment, enclosure (3), or file attachment.
- synonym attached file
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