noun (n)

• an apparatus that produces a vapor or gas(noun.artifact)

  source: wordnet30
• engine that converts mechanical energy into electrical energy by electromagnetic induction(noun.artifact)

  source: wordnet30
• someone who originates or causes or initiates something(noun.person)

  Example:
  He was the generator of several complaints.
  

  Synonym:
  author, source
  

  source: wordnet30
• an electronic device for producing a signal voltage(noun.artifact)

  source: wordnet30
• One who, or that which, generates, begets, causes, or produces.(noun)

  source: webster1913
• Any machine that transforms mechanical into electrical energy; a dynamo.(noun)

  source: webster1913