larboard Syllabification: (lar·board)Pronunciation: /ˈlärˌbôrd, -bərd/Definition of larboard noun Nautical archaic term for port3.Origin: Middle English ladebord (see lade, board), referring to the side on which cargo was put aboard. The change to lar- in the 16th century was due to association with starboardlarboard in other Oxford dictionaries Definition of larboard in the British & World English dictionary