noun (n)

• an organization of military vessels belonging to a country and available for sea warfare(noun.group)

  Synonym:
  naval forces
  

  source: wordnet30
• a dark shade of blue(noun.attribute)

  Synonym:
  dark blue, navy blue
  

  source: wordnet30
• the navy of the United States of America; the agency that maintains and trains and equips combat-ready naval forces(noun.group)

  Synonym:
  united states navy, us navy, usn
  

  source: wordnet30
• A fleet of ships; an assemblage of merchantmen, or so many as sail in company.(noun)

  source: webster1913