The act of restoring deleted information. An undelete is comparable to (and usually included as part of) an undo command; it is more restricted, however, in that “undo” reverses any previous act, but undelete reverses only a deletion. Undelete generally refers only to excised text or deleted files. See also undo.
Command that allows a user to reinstate deleted text or files. See also delete.

1. To restore deleted information, usually the last item deleted.
2. In file storage, to restore a file’s storage information so that a deleted file becomes available for access again. Also called: unerase. See also file recovery.