noun (n)

• a firm in the publishing business(noun.group)

  Synonym:
  publishing company, publishing firm, publishing house
  

  source: wordnet30
• a person engaged in publishing periodicals or books or music(noun.person)

  source: wordnet30
• the proprietor of a newspaper(noun.person)

  Synonym:
  newspaper publisher
  

  source: wordnet30
• One who publishes; as, a publisher of a book or magazine.(noun)

  source: webster1913