noun (n)

• someone whose employment involves carrying something(noun.person)

  Example:
  The bonds were transmitted by carrier.
  

  Synonym:
  bearer, toter
  

  source: wordnet30
• a self-propelled wheeled vehicle designed specifically to carry something(noun.artifact)

  Example:
  Refrigerated carriers have revolutionized the grocery business.
  

  source: wordnet30
• a large warship that carries planes and has a long flat deck for takeoffs and landings(noun.artifact)

  Synonym:
  aircraft carrier, attack aircraft carrier, flattop
  

  source: wordnet30
• an inactive substance that is a vehicle for a radioactive tracer of the same substance and that assists in its recovery after some chemical reaction(noun.substance)

  source: wordnet30
• a person or firm in the business of transporting people or goods or messages(noun.group)

  Synonym:
  common carrier
  

  source: wordnet30
• a radio wave that can be modulated in order to transmit a signal(noun.phenomenon)

  Synonym:
  carrier wave
  

  source: wordnet30
• a man who delivers the mail(noun.person)

  Synonym:
  letter carrier, mail carrier, mailman, postman
  

  source: wordnet30
• a boy who delivers newspapers(noun.person)

  Synonym:
  newsboy
  

  source: wordnet30
• (medicine) a person (or animal) who has some pathogen to which he is immune but who can pass it on to others(noun.person)

  Synonym:
  immune carrier
  

  source: wordnet30
• a rack attached to a vehicle; for carrying luggage or skis or the like(noun.artifact)

  source: wordnet30
• (genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele; the associated trait is not apparent but can be passed on to offspring(noun.animal)

  source: wordnet30
• One who, or that which, carries or conveys; a messenger.(noun)

  source: webster1913