noun (n)

• the basic monetary unit in many countries; equal to 100 cents(noun.quantity)

  source: wordnet30
• a piece of paper money worth one dollar(noun.possession)

  Synonym:
  buck, clam, dollar bill, one dollar bill
  

  source: wordnet30
• a United States coin worth one dollar(noun.possession)

  Example:
  The dollar coin has never been popular in the United States.
  

  Synonym:
  susan b anthony dollar
  

  source: wordnet30
• a symbol of commercialism or greed(noun.communication)

  Example:
  He worships the almighty dollar.
  The dollar sign means little to him.
  

  Synonym:
  dollar mark, dollar sign
  

  source: wordnet30
• A silver coin of the United States containing 371.25 grains of silver and 41.25 grains of alloy, that is, having a total weight of 412.5 grains.(noun)

  source: webster1913