A Padding

1. Soft filling material used in cushions etc.
2. (computing) Extra characters such as spaces added to a record to fill it out to a fixed length.
3. (military, cryptography) Extraneous text added to a message for the purpose of concealing its beginning, ending, or length.^[1]
4. Anything of little value used to fill up space.
5. (obsolete) Robbing on a highway.
6. The process of mordanting a fabric.