noun (n)

• a protective covering (as for a knife or sword)(noun.artifact)

  source: wordnet30
• an enveloping structure or covering enclosing an animal or plant organ or part(noun.body)

  Synonym:
  case
  

  source: wordnet30
• a dress suitable for formal occasions(noun.artifact)

  Synonym:
  cocktail dress
  

  source: wordnet30
• A case for the reception of a sword, hunting knife, or other long and slender instrument; a scabbard.(noun)

  source: webster1913