noun (n)

• the final statement in a verbal argument(noun.communication)

  Example:
  She always gets the last word.
  

  source: wordnet30
• an authoritative statement(noun.communication)

  Example:
  My doctor has the last word on the medicines I take.
  

  source: wordnet30
• elegance by virtue of being fashionable(noun.attribute)

  Synonym:
  chic, chichi, chicness, modishness, smartness, stylishness, swank
  

  source: wordnet30