As a verb appended
As an adjective supplementary is
additional; added to supply what is wanted.
To hang or attach to, as by a string, so that the thing is suspended; as, a seal appended to a record; the inscription was appended to the column.
To add, as an accessory to the principal thing; to annex; as, notes appended to this chapter.
(computing) To write more data to the end of a pre-existing file.
(computing) An instance of writing more data to the end of an existing file.
Additional; added to supply what is wanted.