English to English

noun (n)

• restraint that attaches to something or holds something in place(noun.artifact)

  Synonym:
  fastener, fixing, holdfast
  

  source: wordnet30
• the act of fastening things together(noun.act)

  Synonym:
  attachment
  

  source: wordnet30
• Anything that binds and makes fast, as a lock, catch, bolt, bar, buckle, etc.(noun)

  source: webster1913