noun (n)

• a laborer who loads and unloads vessels in a port(noun.person)

  Synonym:
  dock worker, dock-walloper, docker, dockhand, dockworker, loader, lumper, stevedore
  

  source: wordnet30
• One of a class of laborers employed about the wharves of a seaport, especially in loading and unloading vessels.(noun)

  source: webster1913