noun (n)

• a piece of chain mail covering a place unprotected by armor plate(noun.artifact)

  Synonym:
  voider
  

  source: wordnet30
• a metal plate used to strengthen a joist(noun.artifact)

  Synonym:
  gusset plate
  

  source: wordnet30
• a piece of material used to strengthen or enlarge a garment(noun.artifact)

  Synonym:
  inset
  

  source: wordnet30
• A small piece of cloth inserted in a garment, for the purpose of strengthening some part or giving it a tapering enlargement.(noun)

  source: webster1913